Bug 65839 [JUnit] update job leaks
There are situations when the JUnit update jobs are not properly stopped. Need to add safety checks to make sure that the update job is stopped.
org.eclipse.jdt.junit/src/org/eclipse/jdt/internal/junit/ui/TestRunnerViewPart.java
fRerunLastTestAction= new RerunLastAction();
		fScrollLockAction= new ScrollLockAction(this);
		fToggleOrientationActions =
			new ToggleOrientationAction[] {
				new ToggleOrientationAction(this, VIEW_ORIENTATION_VERTICAL),
				new ToggleOrientationAction(this, VIEW_ORIENTATION_HORIZONTAL),
				new ToggleOrientationAction(this, VIEW_ORIENTATION_AUTOMATIC)};
		fNextAction= new ShowNextFailureAction(this);
		fPreviousAction= new ShowPreviousFailureAction(this);
		fStopAction= new StopAction();
		fNextAction.setEnabled(false);
		fPreviousAction.setEnabled(false);
		fStopAction.setEnabled(false);
		actionBars.setGlobalActionHandler(ActionFactory.NEXT.getId(), fNextAction);
		actionBars.setGlobalActionHandler(ActionFactory.PREVIOUS.getId(), fPreviousAction);
		
		toolBar.add(fNextAction);
		toolBar.add(fPreviousAction);
		toolBar.add(fStopAction);
		toolBar.add(new Separator());
		toolBar.add(fRerunLastTestAction);
		toolBar.add(fScrollLockAction);
		for (int i = 0; i < fToggleOrientationActions.length; ++i)
			viewMenu.add(fToggleOrientationActions[i]);
		
		fScrollLockAction.setChecked(!fAutoScroll);
		actionBars.updateActionBars();
	}
	private IStatusLineManager getStatusLine() {