Simplify the forward slashes in connector code

always use forward slash

function GetParentFolder( $folderPath )
{
   $sPattern = "-[/\\\\][^/\\\\]+[/\\\\]?$-" ;
   return preg_replace( $sPattern, '', $folderPath ) ;
}

function GetParentFolder( $folderPath )
{
   $sPattern = "-/[^/]+/?$-" ;
   return preg_replace( $sPattern, '', $folderPath ) ;
}