scripts/stop_redis.py not shutting down redis

[chrisnatali]

I noticed that upon calling it, the redis process on the redis node was still running. This could mean that connections to dead worker/primary processes are interfering with ModelRunner commands.

Calling redis-cli -a <password> -p <port> shutdown on that machine with the modelrunner conda env activate DOES shut that process down, but also wipes the redis db.