Bug 122869 Drag a parameter from data explorer view into a table in library, a new parameter is created automatically.
Description:Drag a parameter from data explorer view into a table in library, a new parameter is created automatically. Steps to reproduce: 1. Add a cascading parameter and a table in a library file. 2. Drag a parameter from data explorer view into a table cell in layout editor. 3. Find that a new parameter was added in data explorer view automatically.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dialogs/ExpressionTreeSupport.java
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	private TreeItem createSubFolderItem( TreeItem parent, String text )
	{
		return createSubTreeItem( parent, text, IMAGE_FOLDER, true );
	}
	private TreeItem createSubFolderItem( TreeItem parent, IClassInfo classInfo )
	{
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	}
	private void createSubTreeItems( TreeItem parent, String[][] texts,
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