function to disable logins and direct logged-in users to holding page in maintenance/offline mode

trivial change to C::Test::test_error(); ErrorHandler only sends email if ROSE_DEVINIT set to production db; mail_reports.pl retrieves request data object stashed in RecordHandler::_format_report() instead of calling Request model again - can now introduce skip rules eg on screening term if required

added ability to restrict non-network users to own records; added missing _debug_path() to controller methods