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
}
		else
			module.libraries = null;
		
		IElementDefn defn = module.getDefn( );
		for ( int i = 0; i < defn.getSlotCount( ); i++ )
		{
			ContainerSlot slot = module.getSlot( i );
			if ( slot == null )
				continue;
			for ( int pos = 0; pos < slot.getCount( ); pos++ )
			{
				DesignElement innerElement = slot.getContent( pos );
				buildNameSpaceAndIDMap( module, innerElement );
			}
		}
		return module;
	}
	/**
	 * Builds up the namespace and id-map for the cloned module.
	 * 
	 * @param module
	 *            the cloned module to build
	 * @param element
	 *            the element in the module to add into the namespace and id-map
	 */
	private void buildNameSpaceAndIDMap( Module module, DesignElement element )
	{
		if ( module == null || element == null )
			return;