Configurable Pod Readiness Probes

It would be nice to be able to configure the readiness probe that the Couchbase operator sets for pods. Currently the initialDelaySeconds=10 and failureThreshold=1. This is not enough.

I'm using a slightly customized image since I want to use Couchbase with Local Persistent Volumes and not use the default user:group 1000:1000 for security reasons. So I'm running a couple of commands before the Couchbase server is up and running to set permissions etc. Because the commands take a few seconds, and the server isn't up in time, I cannot get a cluster working.

I verified it's a timing issue, because if I create the cluster, then immediately delete the operator, the first node comes up after between 10-20 seconds.