Handle stale information/clean up stale resources #154
Description
Currently our operators will not act on removed information from the CR in some/most/all cases.
One example:
HBase operator has three roles (master, regionServer, restServer). If I create a HBase server CR with a restServer component and then remove it later (entirely, not setting replicas to 0) our operator will not clean up the STS that belongs to this role.
This is done when all stale STSs (and other resources not needed anymore) are cleaned up when they are not needed anymore.
NOTE: This is part of an epic (stackabletech/issues#203) and might not apply to this operator. If that is the case please comment on this issue and just close it. This issue was created as part of a special bulk creation operation.
NOTE2: I picked this issue to add to the To-do list first because I know that it is a problem in HBase and I want to use this issue so any necessary changes can be made to operator-rs (if needed). When this is done we can move all the others as well.