Bug 153040 Template definition should be removed after the report item is deleted
Steps to reproduce: 1.New a report, extends lib.label 2.Convert the label to template report item, and revert it back to the report item 3.Delete the label 4.Remove the included library Expected result: Library can be removed Actual result: A BIRT exception occurred. Plug-in Provider:Eclipse.org Plug-in Name:BIRT Model Plug-in ID:org.eclipse.birt.report.model Version:2.1.0.v20060808-0630 Error Code:Error.LibraryException.LIBRARY_HAS_DESCENDENTS Error Message:The library "Lib" can no be dropped because it has descendents "NewLabel" in the current module.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/command/ContentCommand.java
*            The element to move.
	 * @param fromSlotID
	 *            Old slot location within the container item associated with
	 *            this command.
	 * @param to
	 *            The new container.
	 * @param toSlotID
	 *            the slot within the new container.
	 * @param newPos
	 *            the position in the target slot to which the content will be
	 *            moved. If it is greater than the size of the target slot, the
	 *            content will be appended at the end of the slot.
	 * @throws ContentException
	 */
	public void move( DesignElement content, int fromSlotID, DesignElement to,
			int toSlotID, int newPos ) throws ContentException
	{
		assert newPos >= 0;
		doMove( content, fromSlotID, to, toSlotID, newPos );
	}
	/**
	 * Moves an element from one slot to another. The destination slot can be in
	 * the same element (unusual) or a different element (usual case.) Use the
	 * other form of this method to move an element within the same slot.
	 * 
	 * @param content
	 *            The element to move.
	 * @param fromSlotID
	 *            Old slot location within the container item associated with
	 *            this command.