Bug 148761 Unable to copy a report item from template to report
Steps: 1. Create a template, add a Text item "t1" or others 2. Create template item using "t1" 3. Double click the template item and we get a report item again. 4. We copy the item, paste to another report file. Expected: the text item can be copied. Actual result: Nothing happened, not copied and no error msg.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/command/TemplateCommand.java
* @param obj
	 *            the element to modify.
	 */
	public TemplateCommand( Module module, DesignElement obj )
	{
		super( module, obj );
	}
	/**
	 * Checks the <code>REF_TEMPLATE_PARAMETER_PROP</code> of template
	 * elements to avoid that tit refers a non-exsiting template parameter
	 * definition or a wrong type definition.
	 * 
	 * @param prop
	 *            the definition of property
	 *            <code>REF_TEMPLATE_PARAMETER_PROP</code> in template
	 *            elements
	 * @param value
	 *            the new value to set
	 * @throws PropertyValueException
	 *             throws exception if it refers non-exsiting template parameter
	 *             definition or a wrong type definition
	 */
	public void checkProperty( ElementPropertyDefn prop, Object value )
			throws PropertyValueException
	{
		if ( value == null )
			return;