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
* The theme for the module.
	 */
	private ElementRefValue theme = null;
	/**
	 * The fatal exception found in the included modules, which will stop
	 * opening the outer-most module.
	 */
	protected Exception fatalException;
	
	/**
	 * The registered name manager of this module.
	 */
	
	protected INameManager nameManager = null;
	/**
	 * Default constructor.
	 * 
	 * @param theSession
	 *            the session of the report
	 */
	protected Module( DesignSession theSession )
	{
		session = theSession;
		for ( int i = 0; i < NAME_SPACE_COUNT; i++ )
		{
			nameSpaces[i] = new NameSpace( );
			moduleNameSpaces[i] = ModuleNameScopeFactory
					.createElementNameSpace( this, i );
		}