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/api/core/UserPropertyDefn.java
implements
			IStructure
{
	/**
	 * Display name for the property.
	 */
	private String displayName = null;
	/**
	 * Name of the type member.
	 */
	public static final String TYPE_MEMBER = "type"; 
	/**
	 * Name of the name member.
	 */
	public static final String NAME_MEMBER = "name"; 
	
	/**
	 * Name of the default member.
	 */
	
	public static final String DEFAULT_MEMBER = "default"; 
	/**
	 * Name of the display name member.
	 */
	public static final String DISPLAY_NAME_MEMBER = "displayName"; 
	/**
	 * Name of the display name ID member.