Bug 148755 Add tthe status to the ActivityStackEvent.
If the the event rollback, the ActivityStackEvent status should be ROLL_BACK.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/activity/ActivityStack.java
* committed.
	 * 
	 * @param label
	 *            localized label for the transaction
	 */
	public void startFilterEventTrans( String label )
	{
		if ( !transStack.isEmpty( )
				&& transStack.peek( ) instanceof LayoutCompoundRecord )
			startSilentTrans( label, false );
		else
		{
			boolean outerMost = true;
			if ( !transStack.isEmpty( )
					&& transStack.peek( ) instanceof FilterEventsCompoundRecord )
				outerMost = false;
			transStack
					.push( new FilterEventsCompoundRecord( label, outerMost ) );
		}
	}
	/**
	 * Removes all listeners on the ActivityStack.
	 */
	public void clearListeners( )
	{
		if ( listeners != null )
			listeners.clear( );
		listeners = null;
	}
}