Bump mock_redis from 0.17.2 to 0.17.3 (#2440)
Bump mock_redis from 0.17.2 to 0.17.3 (#2440)

Bumps [mock_redis](https://github.com/brigade/mock_redis) from 0.17.2 to 0.17.3.
- [Changelog](https://github.com/brigade/mock_redis/blob/master/CHANGELOG.md)
- [Commits](https://github.com/brigade/mock_redis/compare/v0.17.2...v0.17.3)
camallen/Panoptes,zooniverse/Panoptes,camallen/Panoptes,camallen/Panoptes,camallen/Panoptes,zooniverse/Panoptes,zooniverse/Panoptes,zooniverse/Panoptes