Bug 121498 When datasource/dataset deleted, the datasource/dataset property binding element haven't been deleted
When deleted the datasource/dataset, the datasource/dataset property binding element haven't been deleted. Expected result: This operation must be a transaction.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/Module.java
module.addElementID( module );
		
		for ( int i = 0; i < NAME_SPACE_COUNT; i++ )
		{
			module.nameSpaces[i] = new NameSpace( );
			module.moduleNameSpaces[i] = ModuleNameScopeFactory
					.createElementNameSpace( module, i );
		}
		
		module.initSlots( );
		for ( int i = 0; i < slots.length; i++ )
		{
			module.slots[i] = slots[i].copy( module, i );
		}
		
		if ( theme != null )
			module.theme = new ElementRefValue( null, theme.getName( ) );
		else
			module.theme = null;
		
		if ( libraries != null )
		{
			for ( int i = 0; i < libraries.size( ); i++ )
			{
				module.libraries = new ArrayList( );
				Library lib = (Library) ( (Library) libraries.get( i ) )
						.clone( );
				lib.setHost( module );
				module.libraries.add( lib );
			}