Checkmk Werk 13515: Fix possible LockNotOwnedError if data is queried from redis

ID: 13515 Title: Fix possible LockNotOwnedError if data is queried from redis Component: Multisite Level: 1 Class: Bug fix Version: 2.1.0i1 If a query to redis took to long, the following error could occur in ~/var/log/web.log: "redis.exceptions.LockNotOwnedError: Cannot release a lock that's no longer owned". This could have happened if you e.g. filtered for host labels in a view.