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
private UpdateUIJob fUpdateJob;
	private StopAction fStopAction;
	
	private class StopAction extends Action {
		public StopAction() {
			setText(JUnitMessages.getString("TestRunnerViewPart.stopaction.text"));
			setToolTipText(JUnitMessages.getString("TestRunnerViewPart.stopaction.tooltip"));
			setDisabledImageDescriptor(JUnitPlugin.getImageDescriptor("dlcl16/stop.gif")); 
			setHoverImageDescriptor(JUnitPlugin.getImageDescriptor("elcl16/stop.gif")); 
			setImageDescriptor(JUnitPlugin.getImageDescriptor("elcl16/stop.gif")); 
		}
		public void run() {
			stopTest();
		}
	}
	private class RerunLastAction extends Action {
		public RerunLastAction() {
			setText(JUnitMessages.getString("TestRunnerViewPart.rerunaction.label")); 
			setToolTipText(JUnitMessages.getString("TestRunnerViewPart.rerunaction.tooltip")); 
			setDisabledImageDescriptor(JUnitPlugin.getImageDescriptor("dlcl16/relaunch.gif")); 
			setHoverImageDescriptor(JUnitPlugin.getImageDescriptor("elcl16/relaunch.gif")); 
			setImageDescriptor(JUnitPlugin.getImageDescriptor("elcl16/relaunch.gif")); 
		}
		
		public void run(){
			rerunTestRun();
		}
	}
	
	private class ToggleOrientationAction extends Action {