Don't use keycloak by default in dev env

Created by: eseliger

It adds very high CPU load the first 2 minutes after startup. Since most developers seem not to need it in their daily lifecycle, and I've seen quite a few disable it by default, I think it's helpful to remove keycloak from the standard processes.

Docker stats output:

9136b0297e09        keycloak              353.38%             537.9MiB / 1.942GiB   25.67%               928B / 150B         219MB / 623kB         105