Bug 188578 Add "displayColumnName" on TabularLevel
Add Property "displayColumnName" on TabbularLevel and corresponding APIs on handle. Property Type: expression.
model/org.eclipse.birt.report.model.tests/test/org/eclipse/birt/report/model/parser/TabularCubeParserTest.java
save( );
		assertTrue( compareFile( "TabularLevelAccessControl_golden_3.xml" ) );
		designHandle.getCommandStack( ).undo( );
		tmpAccess.removeRole( "level role1" ); 
		save( );
		assertTrue( compareFile( "TabularLevelAccessControl_golden_4.xml" ) );
	}
	/**
	 * 
	 * @throws Exception
	 */
	public void testMergeDimensionConditions( ) throws Exception
	{
		openDesign( "CubeParserTest_4.xml" ); 
		TabularCubeHandle cube = (TabularCubeHandle) designHandle
				.findCube( "testCube" ); 
		assertNotNull( cube.findDimensionCondition( "testHierarchy" ) ); 
		assertEquals(
				cube.findDimensionCondition( "testHierarchy" ).getStructure( ), cube.findDimensionCondition( (HierarchyHandle) design.findOLAPElement( "testHierarchy" ).getHandle( design ) ).getStructure( ) ); 
		save( );
		assertTrue( compareFile( "CubeParserTest_golden_3.xml" ) ); 
	}
	private static void checkNotificationStatus( MyListener listener )
	{
		assertEquals( NotificationEvent.PROPERTY_EVENT, listener.getEventType( ) );
		assertEquals( TabularCubeHandle.ACCESS_CONTROLS_PROP, listener
				.getPropName( ) );
		listener.reset( );
	}
	private static class MyListener implements Listener