Fix random failures on ITCollectionsTest

03:32:06,754 ERROR [AbstractTest] Test 'org.nuxeo.ftest.cap.ITCollectionsTest#testRightsOnCollection' failed
org.junit.internal.runners.model.MultipleFailureException: There were 2 errors:
  org.openqa.selenium.TimeoutException(Timed out waiting for page load.
Command duration or timeout: 60.01 seconds
Build info: version: '2.39.0', revision: '14fa800511cc5d66d426e08b0b2ab926c7ed7398', time: '2013-12-16 13:18:38'
System info: host: '24313733ad34', ip: '172.17.0.23', os.name: 'Linux', os.arch: 'amd64', os.version: '3.13.0-49-generic', java.version: '1.8.0_60'
Driver info: org.openqa.selenium.firefox.FirefoxDriver
Capabilities [{applicationCacheEnabled=true, rotatable=false, handlesAlerts=true, databaseEnabled=true, version=26.0, platform=LINUX, browserConnectionEnabled=true, nativeEvents=false, acceptSslCerts=true, webStorageEnabled=true, locationContextEnabled=true, browserName=firefox, takesScreenshot=true, javascriptEnabled=true, cssSelectorsEnabled=true}]
Session ID: fda7c544-1e48-4624-87df-0450a1b7cab7)
  org.openqa.selenium.TimeoutException(Timed out waiting for page load.
Command duration or timeout: 60.01 seconds
Build info: version: '2.39.0', revision: '14fa800511cc5d66d426e08b0b2ab926c7ed7398', time: '2013-12-16 13:18:38'
System info: host: '24313733ad34', ip: '172.17.0.23', os.name: 'Linux', os.arch: 'amd64', os.version: '3.13.0-49-generic', java.version: '1.8.0_60'
Driver info: org.openqa.selenium.firefox.FirefoxDriver
Capabilities [{applicationCacheEnabled=true, rotatable=false, handlesAlerts=true, databaseEnabled=true, version=26.0, platform=LINUX, browserConnectionEnabled=true, nativeEvents=false, acceptSslCerts=true, webStorageEnabled=true, locationContextEnabled=true, browserName=firefox, takesScreenshot=true, javascriptEnabled=true, cssSelectorsEnabled=true}]
Session ID: fda7c544-1e48-4624-87df-0450a1b7cab7)
	at org.junit.runners.model.MultipleFailureException.assertEmpty(MultipleFailureException.java:62)
	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:39)
	at org.nuxeo.functionaltests.LogTestWatchman$1.evaluate(LogTestWatchman.java:94)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
	at org.junit.runners.Suite.runChild(Suite.java:127)
	at org.junit.runners.Suite.runChild(Suite.java:26)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:160)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:138)
	at org.apache.maven.surefire.junitcore.JUnitCoreWrapper.createRequestAndRun(JUnitCoreWrapper.java:113)
	at org.apache.maven.surefire.junitcore.JUnitCoreWrapper.executeEager(JUnitCoreWrapper.java:85)
	at org.apache.maven.surefire.junitcore.JUnitCoreWrapper.execute(JUnitCoreWrapper.java:54)
	at org.apache.maven.surefire.junitcore.JUnitCoreProvider.invoke(JUnitCoreProvider.java:134)
	at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:200)
	at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:153)
	at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:103)

org.openqa.selenium.TimeoutException: Timed out waiting for page load.
Command duration or timeout: 60.01 seconds
Build info: version: '2.39.0', revision: '14fa800511cc5d66d426e08b0b2ab926c7ed7398', time: '2013-12-16 13:18:38'
System info: host: '24313733ad34', ip: '172.17.0.23', os.name: 'Linux', os.arch: 'amd64', os.version: '3.13.0-49-generic', java.version: '1.8.0_60'
Driver info: org.openqa.selenium.firefox.FirefoxDriver
Capabilities [{applicationCacheEnabled=true, rotatable=false, handlesAlerts=true, databaseEnabled=true, version=26.0, platform=LINUX, browserConnectionEnabled=true, nativeEvents=false, acceptSslCerts=true, webStorageEnabled=true, locationContextEnabled=true, browserName=firefox, takesScreenshot=true, javascriptEnabled=true, cssSelectorsEnabled=true}]
Session ID: fda7c544-1e48-4624-87df-0450a1b7cab7
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
	at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:193)
	at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:145)
	at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:554)
	at org.openqa.selenium.remote.RemoteWebElement.execute(RemoteWebElement.java:268)
	at org.openqa.selenium.remote.RemoteWebElement.click(RemoteWebElement.java:79)
	at sun.reflect.GeneratedMethodAccessor7.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.openqa.selenium.support.pagefactory.internal.LocatingElementHandler.invoke(LocatingElementHandler.java:41)
	at com.sun.proxy.$Proxy16.click(Unknown Source)
	at org.nuxeo.functionaltests.pages.AbstractPage.clickOnTabIfNotSelected(AbstractPage.java:309)
	at org.nuxeo.functionaltests.pages.admincenter.AdminCenterBasePage.clickOnTab(AdminCenterBasePage.java:73)
	at org.nuxeo.functionaltests.pages.admincenter.AdminCenterBasePage.clickOnTab(AdminCenterBasePage.java:69)
	at org.nuxeo.functionaltests.pages.admincenter.AdminCenterBasePage.getUsersGroupsHomePage(AdminCenterBasePage.java:77)
	at org.nuxeo.ftest.cap.ITCollectionsTest.tearDown(ITCollectionsTest.java:86)
Caused by: org.openqa.selenium.remote.ErrorHandler$UnknownServerException: Timed out waiting for page load.
Build info: version: '2.39.0', revision: '14fa800511cc5d66d426e08b0b2ab926c7ed7398', time: '2013-12-16 13:18:38'
System info: host: '24313733ad34', ip: '172.17.0.23', os.name: 'Linux', os.arch: 'amd64', os.version: '3.13.0-49-generic', java.version: '1.8.0_60'
Driver info: driver.version: unknown
	at <anonymous class&gt;.Utils.installClickListener/e<(file:///tmp/anonymous4807785924395444413webdriver-profile/extensions/fxdriver@googlecode.com/components/command_processor.js:7490)
	at <anonymous class&gt;.WebLoadingListener/e(file:///tmp/anonymous4807785924395444413webdriver-profile/extensions/fxdriver@googlecode.com/components/command_processor.js:3333)
	at <anonymous class&gt;.WebLoadingListener/<(file:///tmp/anonymous4807785924395444413webdriver-profile/extensions/fxdriver@googlecode.com/components/command_processor.js:3340)
	at <anonymous class&gt;.fxdriver.Timer.prototype.setTimeout/<.notify(file:///tmp/anonymous4807785924395444413webdriver-profile/extensions/fxdriver@googlecode.com/components/command_processor.js:396)