Replace redis with solidcache

[cielf]

Summary

Replace redis with solidcache

Why?

Slimming down our prod

Details

Check that everything we use redis for will still works. Make it so!

Criteria for completion

• [ ] through check of what we are using redis for
• [ ] if there isn't anything but the trend reports:
• • [ ] try cutting over on local
• • [ ] testing of trend reports if we use solidcache instead