Encore fails to start if redis server is not configured to allow `CONFIG` command

[grusell]

Describe the bug
If using a redis server that does not allow the CONFIG command, encore fails to start. Many/some commercial managed redis service (azure redis cache, aws redis cache) does not allow the CONFIG command and therefore can not be used together with encore.

It seems pring data redis uses the CONFIG command to set the 'notify-keyspace-events' property. In managed redis services, this can usually be configured in some other way, so it would make sense if this behaviour of spring data redis could be disabled.

I will provide a PR to fix this.

To Reproduce
Steps to reproduce the behavior:

1. Add rename-command CONFIG "" to the config of your redis server
2. Run encore
3. Encore will fail to start

Expected behavior
It should be possible to configure encore to run even if the CONFIG command is disabled. For correct funcionality this will probably requiring configuring notify-keyspace-events on the server through some other means.

[fhermansson]

Fixed in v0.2.6. Thank you Gustav.