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/api/DesignElementHandle.java
throw new TemplateException(
					getElement( ),
					TemplateException.DESIGN_EXCEPTION_CREATE_TEMPLATE_ELEMENT_FORBIDDEN );
		TemplateCommand cmd = new TemplateCommand( getModule( ), getContainer( )
				.getElement( ) );
		TemplateElement template = cmd.createTemplateElement( getElement( ),
				getElement( ).getContainerSlot( ), name );
		if ( template == null )
			return null;
		return (TemplateElementHandle) template.getHandle( module );
	}
	/**
	 * Creates a template element handle and transforms the current element
	 * handle to the created template element if the current element is based on
	 * a template parameter definition.
	 * 
	 * @param name
	 *            the name of created template element handle
	 * @return the template element handle
	 * @throws SemanticException
	 *             if the current element can not be transformed to a template
	 *             element, current element has no template parameter
	 *             definition, current module is not a report design or some
	 *             containing contexts don't match
	 */
	public TemplateElementHandle revertToTemplate( String name )
			throws SemanticException
	{
		if ( getRoot( ) == null )
			throw new TemplateException(