Bug 153378 [Regression]Label text won't show up when the text key is not found
Steps to reproduce: 1.Add a label, set text to "aaa" 2.Add a resource file "a" to the report, add a text key "k1" which is not in the a.properties to the label 3.Preview in Web Viewer Expected result: Label display "aaa" when the text key is not found Actual result: Nothing in preview
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/util/DocumentUtil.java
case IModuleModel.PAGE_SLOT :
				case IModuleModel.COMPONENT_SLOT :
				case IReportDesignModel.BODY_SLOT :
				case IReportDesignModel.SCRATCH_PAD_SLOT :
				case IReportDesignModel.TEMPLATE_PARAMETER_DEFINITION_SLOT :
					resolveSlot( target, source, i );
					break;
			}
		}
		return target;
	}
	/**
	 * Resolves element references of all the elements in any level of the slot.
	 * 
	 * @param targetDesign
	 *            the target design to resolve the element references
	 * @param sourceDesign
	 *            the source design
	 * @param slot
	 *            the slot id of the report design
	 */
	static void resolveSlot( ReportDesign targetDesign,
			ReportDesign sourceDesign, int slot )
	{
		if ( targetDesign == null || sourceDesign == null )
			return;
		ContentIterator iter = new ContentIterator( targetDesign, slot );
		while ( iter.hasNext( ) )
		{
			DesignElement target = (DesignElement) iter.next( );