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
.newAccessControl( );
		propHandle.add( accessControl );
		
		accessControl.addUserName( "new cube user1" ); 
		checkNotificationStatus( listener );
		propHandle = accessControl
				.getPropertyHandle( IAccessControlModel.USER_NAMES_PROP );
		propHandle.addItem( "new cube user2" ); 
		checkNotificationStatus( listener );
		propHandle.removeItem( 1 );
		checkNotificationStatus( listener );
		assertEquals( "new cube user1", propHandle.getStringValue( ) ); 
		designHandle.getCommandStack( ).undo( );
		checkNotificationStatus( listener );
		assertEquals(
				"new cube user1; new cube user2", propHandle.getStringValue( ) ); 
		propHandle.removeItem( "new cube user1" ); 
		checkNotificationStatus( listener );
		assertEquals( "new cube user2", propHandle.getStringValue( ) ); 
		accessControl.addRole( "new cube role1" ); 
		checkNotificationStatus( listener );
		accessControl.removeRole( "new cube role1" ); 
		checkNotificationStatus( listener );
		
		accessControl
				.setPermission( DesignChoiceConstants.ACCESS_PERMISSION_ALLOW );
		checkNotificationStatus( listener );
		
		accessControl = designHandle.getElementFactory( ).newAccessControl( );
		cube.add( TabularCubeHandle.ACCESS_CONTROLS_PROP, accessControl );