Bug 214648 [Markers] AttributeMarkerGroupings and GroupingEntries not being cleaned up on removal
We are still leaving the references to AttributeMarkerGroupings and GroupingEntries when we unload
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/MarkerGroupingEntry.java
private MarkerGroup markerGroup;
	private String label;
	private String id;
	private int sortPriority;
	
	/**
	 * Create a new instance of the receiver with name name and an id of
	 * identifier.
	 * @param name
	 * @param identifer
	 * @param priority
	 */
	public MarkerGroupingEntry(String name, String identifer, int priority) {
		label = name;