Bug 153517 The DND of embeddedimage from lib explorer to outline view doesn'w work when the report in outline has used the lib
If the report in outline view has used a library, then drag and drop an embeddedimage of the used library from lib explorer to outline view doesn't work. The DND drop nothing onto the embedded image of the target report. Steps to reproduce: 1.Create a library with an embeddediamge and export to resource folder; 2.Create a new report design; 3.Drag the embeddedimage of lib from lib explorer to outline view;
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DNDUtil.java
* If transfer data is single element, validate target's container also
	 * 
	 * @param targetObj
	 *            target elements
	 * @param transferData
	 *            transfer data,single object or array are permitted
	 * @param validateContainer
	 *            validate target's container can contain
	 * @return If target elements can't be dropped, return CONTAIN_NO.
	 *         <p>
	 *         If target elements can be dropped, return CONTAIN_THIS.
	 *         <p>
	 *         If target's container can be dropped, return CONTAIN_PARENT
	 */
	public static int handleValidateTargetCanContain( Object targetObj,
			Object transferData, boolean validateContainer )
	{
		if ( targetObj == null || transferData == null )
			return CONTAIN_NO;
		if ( transferData instanceof StructuredSelection )
		{
			return handleValidateTargetCanContain( targetObj,
					( (StructuredSelection) transferData ).toArray( ),
					validateContainer );
		}
		else if ( transferData instanceof Object[] )
		{
			Object[] array = (Object[]) transferData;
			if ( array.length == 1 )
			{