jst.web.ui.tests are killed by timeout

jQuery palette wizards tests fail because there is no web browser in jenkins. Our palette catches SWT errors and log them but Eclipse threat them as critical errors when we are trying to write them in the log and show an error dialog. This dialog blocks UI until the test is killed by timeout.

[ERROR] Failed to execute goal org.eclipse.tycho:tycho-surefire-plugin:0.17.0:test (default-test) on project org.jboss.tools.jst.web.ui.test: Error while executing platform: org.codehaus.plexus.util.cli.CommandLineTimeOutException: Error while executing external command, process killed. Process timeout out after 2400 seconds -> [Help 1]

We should wrap this SWT error in a new exception before logging it.