Bug 115630 [Markers] New markerSupport features are not dynamic
M3 We need to add suites and test the the category support is dynamic.
bundles/org.eclipse.ui.ide/src/org/eclipse/ui/views/markers/internal/MarkerSupportRegistry.java
* @param markerType
	 * @return String or <code>null</code>
	 */
	public String getCategory(String markerType) {
		if (categories.containsKey(markerType))
			return (String) categories.get(markerType);
		return null;
	}
	/**
	 * Return the TableSorter that corresponds to type.
	 * 
	 * @param type
	 * @return TableSorter
	 */
	public TableSorter getSorterFor(String type) {
		if (hierarchyOrders.containsKey(type))
			return (TableSorter) hierarchyOrders.get(type);
		TableSorter sorter = findSorterInChildren(type, getRootType());
		if (sorter == null)
			return new TableSorter(new IField[0], new int[0],
					new int[0]);
		return sorter;
	}
	/**
	 * Return the list of root marker types.
	 * 
	 * @return List of MarkerType.
	 */
	private MarkerType getRootType() {
		if (rootType == null) {