AMBARI-3145. ambari-agent service script should return non-zero when the agent is not running. Fixed service script as well. (Vitaly Brodetskyi via dlysnichenko)

ambari-agent/etc/init.d/ambari-agent

@@ -28,6 +28,7 @@ case "$1" in
         ;;
   status)
         /usr/sbin/ambari-agent $@
+        exit $?
         ;;
   restart)
         $0 stop