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
getElement( ),
					TemplateException.DESIGN_EXCEPTION_CREATE_TEMPLATE_ELEMENT_FORBIDDEN );
		TemplateCommand cmd = new TemplateCommand( getModule( ), getContainer( )
				.getElement( ) );
		TemplateElement template = cmd.revertToTemplate( getElement( ),
				getElement( ).getContainerSlot( ), name );
		if ( template == null )
			return null;
		return (TemplateElementHandle) template.getHandle( module );
	}
	/**
	 * if this design element is based on a template definition
	 * {@link #isTemplateParameterValue( )},get rid of the template definition )
	 * 
	 * @throws SemanticException
	 */
	public void revertToReportItem( ) throws SemanticException
	{
		clearProperty( REF_TEMPLATE_PARAMETER_PROP );
	}
	/**
	 * Checks whether this element is based on a template parameter definition
	 * or not. Call this method before calling method
	 * {@link #revertToTemplate(String) }to assure that this element can be
	 * reverted to a template element. If this method returns false, method
	 * <code>revertToTemplate(String)</code> must fail too.
	 * 
	 * @return true if this element is based on a template parameter definition,
	 *         otherwise false
	 */