Bug 154832 Wrong node is added to Report Parameters for cascading parameter in Palette view
Description: Wrong node is added to Report Parameters for cascading parameter in Palette view. Steps to reproduce: 1. New a report, add a cascading parameter 2. Switch to Script tab in Editor view, and then switch to Palette view 3. Expand Report Parameters node Expected result: A cascading parameter group is added to Report Parameters node Actual result: Expect a cascading parameter group is added to Report Parameters node, the children of the cascading parameter group are added as scalar parameters
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dialogs/ExpressionTreeSupport.java
expression.append( className + "." );
			}
			expression.append( info.getName( ) );
			expression.append( "(" );	
			IArgumentInfoList arguments = (IArgumentInfoList) it.next( );
			boolean firstTime = true;
			for ( Iterator iterator = arguments.argumentsIterator( ); iterator.hasNext( ); )
			{
				IArgumentInfo argument = (IArgumentInfo) iterator.next( );
				if ( !firstTime )
				{
					displayText.append( ", " );
				}
				firstTime = false;
				displayText.append( IArgumentInfo.OPTIONAL_ARGUMENT_NAME.equals( argument.getName( ) ) ? argument.getDisplayName( )
						: ( argument.getType( ) + " " + argument.getDisplayName( ) ) ); 
			}
			displayText.append( ")" );
			expression.append( ")" );
			array[0] = displayText.toString( );
			array[1] = expression.toString( );
			list.add( array );
		}
		return list;
	}
	private String getMemberTextData( String className, ILocalizableInfo info )
	{
		StringBuffer textData = new StringBuffer( );
		if ( !isGlobal( className ) && isStatic( info ) )
		{