JBIDE-14515 cdi.ui tests failure

JobUtils.waitForIdle(...) timeout issue is fixed.
Wrong startup definition that caused NoSuchMethodException to be logged is excluded from org.jboss.tools.common.validation/plugin.xml
Explicit JavaEditorTracker initialization is added for the tests due to fix the issue
AbstractAsYouTypeValidationTest.waitForAnnotation() runnable is fixed to let other than Display Thread to process while waiting for annotation.