Bug 200478 Name of date/time group level issue[1101]
Description: Name of date/time group level issue[1101] Step: 1. New a sample datasource and dataset from orders. 2. New a data cube and binding to the dataset. 3. Drop the column of "ORDERDATE" to group and select the year type. At this time, the name of group level is "year(ORDERDATE: DateTime)" 4. Edit the the group level. 5. Change the type as month. Actual result: The name of group level is "year(ORDERDATE: DateTime, DateTime)" Expected result: The name of group level is "year(ORDERDATE: DateTime)"
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/command/PropertyCommand.java
* 
	 * @param prop
	 *            definition of the property to set
	 * @param value
	 *            the new property value.
	 * @throws SemanticException
	 *             if the value is invalid or the property mask is "lock".
	 */
	public void setProperty( ElementPropertyDefn prop, Object value )
			throws SemanticException
	{
		checkAllowedOperation( );
		
		if ( prop.isElementType( ) )
		{
			setElementTypeProperty( prop, value );
			return;
		}
		
		String propName = prop.getName( );
		if ( ( IReportItemModel.TOC_PROP.equals( propName ) || IGroupElementModel.TOC_PROP
				.equals( propName ) ) &&
				( value instanceof String ) )
		{
			Object oldValue = element.getLocalProperty( module, prop );
			if ( oldValue != null )
			{
				MemberRef ref = new CachedMemberRef( prop, TOC.TOC_EXPRESSION );
				setMember( ref, value );
				return;