Bug 188829 Move the item ,the trans of the model don't close.
1:New report design. 2:Add a Embedded image. 3:Add another imge , then drag the second imge to the first position. 4:Change the size of the first image. Expected: Image change the size. Now: Image size don't change.
model/org.eclipse.birt.report.model.tests/test/org/eclipse/birt/report/model/command/ContentCommandTest.java
* <ul>
	 * <li>Set style to label. Add label to otherCont. Add otherCont to cont.
	 * Add cont to container. Remove cont from container. The expected result
	 * is: There is no content in container. There is no content in cont. There
	 * is no content in otherCont. There is no style on label. Style's clint
	 * list is empty.
	 * </ul>
	 * 
	 * @throws Exception
	 *             if any exception
	 */
	public void testRemoveContainerFromContainer( ) throws Exception
	{
		FreeForm cont = new FreeForm( );
		FreeForm otherCont = new FreeForm( );
		Label label = new Label( );
		Style style = new Style( );
		cont.getHandle( design ).getSlot( 0 )
				.add( otherCont.getHandle( design ) );
		otherCont.getHandle( design ).getSlot( 0 ).add(
				label.getHandle( design ) );
		containerHandle.getSlot( 0 ).add( cont.getHandle( design ) );
		assertEquals( cont, container.getSlot( 0 ).getContent( 0 ) );
		assertEquals( otherCont, cont.getSlot( 0 ).getContent( 0 ) );
		containerHandle.getSlot( 0 ).dropAndClear( cont.getHandle( design ) );
		assertEquals( 0, container.getSlot( 0 ).getCount( ) );
		assertEquals( 0, cont.getSlot( 0 ).getCount( ) );
		assertEquals( 0, otherCont.getSlot( 0 ).getCount( ) );
		assertNull( label.getContainer( ) );
		assertEquals( 0, style.getClientList( ).size( ) );