remove config cache from sfs
Context
sFs store solr's schema in redis. Shema is mandatory to build a query.
When a schema is updated (after load and update of a structure), sFs write the new version to redis and cache it in memory.
This behaviour makes sfs stateful so incompatible with a multi replicas deployment.
Todo
- remove cache
- read schema from cache for each request (mesure cost)
If cost is too heavy, use stream from redis to link all sfs instances and broadcast schema updates to all instances.