Run fewer es queries with elastic_recheck.

Currently elastic-recheck is hammering the ElasticSearch cluster every
15 minutes, basically bringing everything else to a halt while these
queries are processed. Spread elastic-recheck periodic queries out, run
each once an hour and 20 minutes after the previous set of queries.

Also, remove the auto triggering when files change, instead we wait for
the hour to roll over and give us new data.

Change-Id: Ibf5dad1071f65f8d676e8b9a0ec4331bada9943f
Merge "Run fewer es queries with elastic_recheck."