Javier Pena 1b7a931fd1 Replace keystone db flush cron job with a Fernet key rotation job
Previously, we had a cron job to flush removed keystone tokens. Since
[1] this is not required anymore, but we need to add a cron job to
rotate Fernet keys.

[1] - https://review.openstack.org/544547

Change-Id: I331788ea08322a6f982c87eb195a619bab1c4d2e
2018-08-21 09:55:18 +00:00
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