Made fallback test critical for all failures

SiteTests/testjob/tests/CE-cms-xrootd-fallback

@@ -402,8 +402,6 @@ def main():
 
     if exitCode:
         returnCode = NAG_CRITICAL
-        if numCatalogs > 1:   # Fallback correctly configured, so only WARN
-            returnCode = NAG_WARNING
         return print_summary("Failed cmsRun; exit code %d" % exitCode, returnCode)
     log.info("Successful cmsRun.")