Bug 153853 [Regression]The bound column names must be unique within the entire table.
Regression case Regression_136421(under org.eclipse.birt.report.tests.model) failed. Expected result: Model will avoid adding a duplicate bound column name within a table.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/api/ModuleHandle.java
public void dropAllScriptLibs( ) throws SemanticException
	{
		List scriptLibs = getListProperty( SCRIPTLIBS_PROP );
		int count = scriptLibs.size( );
		for ( int i = count - 1; i >= 0; --i )
		{
			ScriptLib scriptLib = (ScriptLib) scriptLibs.get( i );
			dropScriptLib( scriptLib );
		}
	}
	/**
	 * Returns the iterator over all script libs. Each one is the instance of
	 * <code>ScriptLibHandle</code>.
	 * <p>
	 * 
	 * @return the iterator over script libs.
	 * @see ScriptLibHandle
	 */
	public Iterator scriptLibsIterator( )
	{
		return getFilteredStructureList( SCRIPTLIBS_PROP,
				ScriptLib.SCRIPTLIB_NAME_MEMBER ).iterator( );
	}
	/**
	 * Returns all script libs.
	 * 
	 * @return list which structure is <code>ScriptLibHandle</code>
	 */
	public List getAllScriptLibs( )
	{