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
}
	/**
	 * Gets the property definition whose detail type is of the given structure
	 * name.
	 * 
	 * @param structureName
	 *            the structure name to search
	 * @return the property definition whose detail type is of the given
	 *         structure name, otherwise null
	 */
	public ElementPropertyDefn getReferencablePropertyDefn( String structureName )
	{
		if ( referencableProperties == null )
		{
			referencableProperties = new HashMap( );
			referencableProperties.put( ConfigVariable.CONFIG_VAR_STRUCT,
					getPropertyDefn( CONFIG_VARS_PROP ) );
			referencableProperties.put( EmbeddedImage.EMBEDDED_IMAGE_STRUCT,
					getPropertyDefn( IMAGES_PROP ) );
			referencableProperties.put( CustomColor.CUSTOM_COLOR_STRUCT,
					getPropertyDefn( COLOR_PALETTE_PROP ) );
		}
		return (ElementPropertyDefn) referencableProperties.get( structureName );
	}
	/**
	 * Returns the list of errors accumulated during a batch operation. These
	 * errors can be serious errors or warnings. Each one is the instance of
	 * <code>ErrorDetail</code>.
	 * 
	 * @return the list of errors or warning