Improve error handling when remote check fails

libexec/check_rattail_daemon_by_ssh.py

@@ -108,7 +108,11 @@ if __name__ == '__main__':
 
     # Ok now connect, and try to get values for memory
     client = schecks.connect(hostname, port, ssh_key_file, passphrase, user)
-    result, exitcode = execute_check(client, check_path)
-
-    print result
-    sys.exit(exitcode)
+    result = execute_check(client, check_path)
+    if result is False:
+        print("failed to execute remote check!")
+        sys.exit(3)
+    else:
+        output, exitcode = result
+        print(output)
+        sys.exit(exitcode)