Fix failing 'ITWizardAndUpdateCenterTests.runWizardAndRestart' test

org.openqa.selenium.NoSuchElementException: Unable to find login screen after 10 minutes, currentUrl=http://localhost:8080/nuxeo/Restart
For documentation on this error, please visit: http://seleniumhq.org/exceptions/no_such_element.html
Build info: version: '2.39.0', revision: '14fa800511cc5d66d426e08b0b2ab926c7ed7398', time: '2013-12-16 13:18:38'
System info: host: 'tweedledum', ip: '10.182.198.132', os.name: 'Windows Server 2008 R2', os.arch: 'amd64', os.version: '6.1', java.version: '1.7.0_17'
Driver info: driver.version: unknown
	at org.nuxeo.functionaltests.Locator.findElementWithTimeout(Locator.java:204)
	at org.nuxeo.functionaltests.Locator.findElementWithTimeout(Locator.java:170)
	at org.nuxeo.functionaltests.pages.AbstractPage.findElementWithTimeout(AbstractPage.java:153)
	at org.nuxeo.functionaltests.pages.wizard.SummaryWizardPage.restart(SummaryWizardPage.java:36)
	at org.nuxeo.functionaltests.ITWizardAndUpdateCenterTests.runWizardAndRestart(ITWizardAndUpdateCenterTests.java:246)
	at org.nuxeo.functionaltests.ITWizardAndUpdateCenterTests.testAll(ITWizardAndUpdateCenterTests.java:67)