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
* 
	 * @return a string array containing all the resource keys defined for
	 *         messages return null if there is no messages stored.
	 */
	public String[] getTranslationResourceKeys( )
	{
		return translations.getResourceKeys( );
	}
	/**
	 * Finds user defined messages for the current thread's locale.
	 * 
	 * @param resourceKey
	 *            Resource key of the user defined message.
	 * @return the corresponding locale-dependent messages. Return
	 *         <code>""</code> if resoueceKey is blank or the message is not
	 *         found.
	 * @see #getMessage(String, Locale)
	 */
	public String getMessage( String resourceKey )
	{
		return getMessage( resourceKey, ThreadResources.getLocale( ) );
	}
	/**
	 * Finds user-defined messages for the given locale.
	 * <p>
	 * First we look up in the report itself, then look into the referenced
	 * message file. Each search uses a reduced form of Java locale-driven
	 * search algorithm: Language&Country, language, default.
	 * 
	 * @param resourceKey