add metrics for hydra notifications.

Dependencies

• [2] BZSJO2RM hydra-send-stats: Keep track of the number of machines
• [*] DODOGD7M Send queue runner stats to statsd

Change contents

• edit in src/script/hydra-send-stats at line 59
  [2.189]

  [4.1831]
  + gauge("hydra.queue.notification.time_avg_ms", $json->{nrNotificationTimeAvgMs});

  + gauge("hydra.queue.notification.time_ms", $json->{nrNotificationTimeMs});

  + gauge("hydra.queue.notification.done", $json->{nrNotificationsDone});

  + gauge("hydra.queue.notification.failed", $json->{nrNotificationsFailed});

  + gauge("hydra.queue.notification.in_progress", $json->{nrNotificationsInProgress});

  + gauge("hydra.queue.notification.pending", $json->{nrNotificationsPending});