Remove job logs database keys

Now that the job logs are nicely arranged in a directory, this sort key
functionality is no longer necessary.
Fix pgrep usage logic
Merge pull request #1422 from matthewrmshin/pgrep

Fix pgrep usage
Merge pull request #1391 from matthewrmshin/remove-job-logs-db-keys

Remove job logs database keys
Merge branch 'master' into refactor-rosie.ws_client