Support renaming commands in Redis

[logdnalf]

Expected behaviour

Redis Operator should allow to deploy Redis and allow the administrator to rename commands using the rename-command functionality in Redis. The ability to rename commands in Redis is a way to improve security by obscuring certain operations or by disabling them entirely.

Actual behaviour

Redis Operator does not allow using the rename-command because the CONFIG runtime operation does not allow it. rename-command has to be specified inside the redis.conf file.

Steps to reproduce the behaviour

Try to use rename-command inside the custom configuration and deployment will fail. Renaming commands is not supported at runtime using CONFIG.