Bug 163018 An error extension will lead the report contain chart can't be opened and can not new a report.
Details: An error extension will lead the report contain chart can't open In org.eclipse.birt.report.tests.model has an error extension. When run the birt use workbenck, the report contain chart can't be opened and it can not new a report.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/metadata/ObjectDefn.java
*/
	protected String name = null;
	/**
	 * The message catalog ID to use to look up the display name for this
	 * object.
	 */
	protected String displayNameKey = null;
	/**
	 * Property definitions.
	 */
	protected Map properties = new LinkedHashMap( );
	/**
	 * The BIRT release when this object was introduced.
	 */
	protected String since;
	/**
	 * Default constructor.
	 */
	public ObjectDefn( )
	{
		since = "none"; 
	}
	/**
	 * Constructs the definition given its name.
	 * 
	 * @param theName
	 *            the internal name
	 */
	public ObjectDefn( String theName )
	{