deregister handler runs twice (send DELETE API request twice too)

[keitap]

Is this expected?

1. deregister event:create is sent
2. deregister handler runs
3. deregister event:resolve is sent (by DELETE request?)
4. deregister handler runs again

I believe this doesn't harm to anything though.

Logs:

{"timestamp":"2016-05-11T05:56:20.915602+0000","level":"info","message":"processing event","event":{"id":"e9cb838b-e219-416c-a703-41fbbad50624","client":{"name":"hostname","address":"0.0.0.0","subscriptions":["all","web","web_front"],"version":"0.22.1","timestamp":1462946176},"check":{"name":"api_call","output":"delete","process":"init","user":"root","status":1,"handler":"deregister","executed":1462946180,"issued":1462946180,"history":["1"],"total_state_change":0},"occurrences":1,"action":"create","timestamp":1462946180}}
{"timestamp":"2016-05-11T05:56:21.128702+0000","level":"info","message":"processing event","event":{"id":"e1b11546-ab0f-49d4-aac4-e5bc05e7cfa7","client":{"name":"hostname","address":"0.0.0.0","subscriptions":["all","web","web_front"],"version":"0.22.1","timestamp":1462946176},"check":{"name":"api_call","output":"Resolving on request of the API","process":"init","user":"root","status":0,"handler":"deregister","executed":1462946181,"issued":1462946181,"total_state_change":0,"force_resolve":true,"history":["1","0"]},"occurrences":1,"action":"resolve","timestamp":1462946181}}
{"timestamp":"2016-05-11T05:56:21.132083+0000","level":"info","message":"handler output","handler":{"type":"pipe","command":"/opt/sensu/embedded/bin/handler-sensu-deregister.rb","name":"deregister"},"output":["202: Successfully deleted Sensu client: hostname\n"]}
{"timestamp":"2016-05-11T05:56:21.330140+0000","level":"info","message":"handler output","handler":{"type":"pipe","command":"/opt/sensu/embedded/bin/handler-sensu-deregister.rb","name":"deregister"},"output":["202: Successfully deleted Sensu client: hostname\n"]}