Fix webdriver market place tests on 5.5.0 branch

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Test set: org.nuxeo.functionaltests.ITTests
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Tests run: 1, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 242.564 sec <<< FAILURE!
testAll(org.nuxeo.functionaltests.ITTests)  Time elapsed: 218.12 sec  <<< ERROR!
org.openqa.selenium.NoSuchElementException: Couldn't find element 'By.xpath: id('row_audit-web-access-1.0.6')//a[contains(@class ,'button')]' after timeout
For documentation on this error, please visit: http://seleniumhq.org/exceptions/no_such_element.html
Build info: version: '2.31.0', revision: '1bd294d', time: '2013-02-27 20:52:59'
System info: os.name: 'Linux', os.arch: 'amd64', os.version: '3.2.0-49-generic', java.version: '1.6.0_26'
Driver info: driver.version: unknown
	at org.nuxeo.functionaltests.AbstractTest.findElementWithTimeout(AbstractTest.java:338)
	at org.nuxeo.functionaltests.AbstractTest.findElementWithTimeout(AbstractTest.java:300)
	at org.nuxeo.functionaltests.pages.AbstractPage.findElementWithTimeout(AbstractPage.java:94)
	at org.nuxeo.functionaltests.pages.admincenter.PackageListingPage.getPackageLink(PackageListingPage.java:33)
	at org.nuxeo.functionaltests.pages.admincenter.PackageListingPage.getPackageDownloadLink(PackageListingPage.java:37)
	at org.nuxeo.functionaltests.pages.admincenter.PackageListingPage.download(PackageListingPage.java:58)
	at org.nuxeo.functionaltests.ITWizardAndUpdateCenter.installPackageAndRestart(ITWizardAndUpdateCenter.java:352)
	at org.nuxeo.functionaltests.ITWizardAndUpdateCenter.testAll(ITWizardAndUpdateCenter.java:401)
	at org.nuxeo.functionaltests.ITTests.testAll(ITTests.java:27)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:44)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:41)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:76)
	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:28)
	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:31)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
	at org.apache.maven.surefire.junit4.JUnit4TestSet.execute(JUnit4TestSet.java:35)
	at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:115)
	at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:97)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at org.apache.maven.surefire.booter.ProviderFactory$ClassLoaderProxy.invoke(ProviderFactory.java:103)
	at $Proxy0.invoke(Unknown Source)
	at org.apache.maven.surefire.booter.SurefireStarter.invokeProvider(SurefireStarter.java:150)
	at org.apache.maven.surefire.booter.SurefireStarter.runSuitesInProcess(SurefireStarter.java:91)
	at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:69)
Caused by: org.openqa.selenium.NoSuchElementException: Unable to locate element: {"method":"xpath","selector":"id('row_audit-web-access-1.0.6')//a[contains(@class ,'button')]"}
Command duration or timeout: 19 milliseconds
For documentation on this error, please visit: http://seleniumhq.org/exceptions/no_such_element.html
Build info: version: '2.31.0', revision: '1bd294d', time: '2013-02-27 20:52:59'
System info: os.name: 'Linux', os.arch: 'amd64', os.version: '3.2.0-49-generic', java.version: '1.6.0_26'
Session ID: 35c2d9c7-9ec9-47f5-a581-c5ec37d46299
Driver info: org.openqa.selenium.firefox.FirefoxDriver
Capabilities [{platform=LINUX, javascriptEnabled=true, acceptSslCerts=true, browserName=firefox, rotatable=false, locationContextEnabled=true, version=3.6.16, cssSelectorsEnabled=true, handlesAlerts=true, nativeEvents=false, webStorageEnabled=true, applicationCacheEnabled=true, takesScreenshot=true}]
	at sun.reflect.GeneratedConstructorAccessor11.newInstance(Unknown Source)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
	at org.openqa.selenium.remote.ErrorHandler.createThrowable(ErrorHandler.java:187)
	at org.openqa.selenium.remote.ErrorHandler.throwIfResponseFailed(ErrorHandler.java:145)
	at org.openqa.selenium.remote.RemoteWebDriver.execute(RemoteWebDriver.java:554)
	at org.openqa.selenium.remote.RemoteWebDriver.findElement(RemoteWebDriver.java:307)
	at org.openqa.selenium.remote.RemoteWebDriver.findElementByXPath(RemoteWebDriver.java:404)
	at org.openqa.selenium.By$ByXPath.findElement(By.java:344)
	at org.openqa.selenium.remote.RemoteWebDriver.findElement(RemoteWebDriver.java:299)
	at org.nuxeo.functionaltests.AbstractTest.findElementWithTimeout(AbstractTest.java:322)
	... 38 more
Caused by: org.openqa.selenium.remote.ErrorHandler$UnknownServerException: Unable to locate element: {"method":"xpath","selector":"id('row_audit-web-access-1.0.6')//a[contains(@class ,'button')]"}
Build info: version: '2.31.0', revision: '1bd294d', time: '2013-02-27 20:52:59'
System info: os.name: 'Linux', os.arch: 'amd64', os.version: '3.2.0-49-generic', java.version: '1.6.0_26'
Driver info: driver.version: unknown
	at <anonymous class>.<anonymous method>(file:///tmp/anonymous5873794623076917226webdriver-profile/extensions/fxdriver@googlecode.com/components/driver_component.js:6784)
	at <anonymous class>.<anonymous method>(file:///tmp/anonymous5873794623076917226webdriver-profile/extensions/fxdriver@googlecode.com/components/driver_component.js:8281)
	at <anonymous class>.<anonymous method>(file:///tmp/anonymous5873794623076917226webdriver-profile/extensions/fxdriver@googlecode.com/components/driver_component.js:8290)
	at <anonymous class>.<anonymous method>(file:///tmp/anonymous5873794623076917226webdriver-profile/extensions/fxdriver@googlecode.com/components/command_processor.js:263)
	at <anonymous class>.<anonymous method>(file:///tmp/anonymous5873794623076917226webdriver-profile/extensions/fxdriver@googlecode.com/components/command_processor.js:10272)
	at <anonymous class>.<anonymous method>(file:///tmp/anonymous5873794623076917226webdriver-profile/extensions/fxdriver@googlecode.com/components/command_processor.js:10277)
	at <anonymous class>.<anonymous method>(file:///tmp/anonymous5873794623076917226webdriver-profile/extensions/fxdriver@googlecode.com/components/command_processor.js:10217)