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
* <li>Add A into container.
	 * <li>Set A extends from B, Set C extends from A.
	 * <li>Set A has style.
	 * <li>Add A into container.
	 * <li>Remove A from the container.
	 * <li>Check the extends reference and style reference on A.
	 * </ul>
	 * 
	 * <p>
	 * The expected result: C extends from B. Parent reference and style
	 * reference on A are broken.
	 * 
	 * @throws Exception
	 */
	public void testReferencAfterDeletion( ) throws Exception
	{
		Label A = new Label( );
		A.setName( "A" ); 
		
		SlotHandle containerHandle = designHandle.getComponents( );
		assertNotNull( containerHandle );
		
		containerHandle.add( A.getHandle( design ) );
		Label B = new Label( );
		B.getHandle( design ).setName( "B" );
		Label C = new Label( );
		C.getHandle( design ).setName( "C" );
		Style style = new Style( );
		style.getHandle( design ).setName( "style" );
		A.setExtendsElement( B );