Bug 120503 Cascading Parameter can not drop into layout
Details: Cascading Parameter can not drop into layout Step: 1.Open a report design and Create a Sample Data Source and data set by "select * from CLASSICMODELS.CUSTOMERS" 2.New a cascading parameter and create CUSTOMERSNUMBER and CUSTOMERSNAME in parameter named number and name. Press OK 3.Drop parameter name into layout. Actual results: The parameter in Cascading Parameter Group can not drop to layout
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DEUtil.java
* @param val
	 *            String value.
	 * @return RGB value.
	 */
	public static RGB getRGBValue( String val )
	{
		if ( val != null )
		{
			if ( val.startsWith( "#" ) ) 
			{
				int rgb = ColorUtil.parseColor( val );
				if ( rgb != -1 )
				{
					return getRGBValue( rgb );
				}
			}
			else
			{
				String[] ss = val.split( "," ); 
				if ( ss.length == 3 )
				{
					try
					{
						int r = Integer.parseInt( ss[0] );
						int g = Integer.parseInt( ss[1] );
						int b = Integer.parseInt( ss[2] );
						return new RGB( r, g, b );
					}
					catch ( NumberFormatException e )
					{