rook: zap and values fixes

[robinAwallace]

What this PR does / why we need it:

Found two issues when trying it out.

Which issue this PR fixes (use the format fixes #<issue number>(, fixes #<issue_number>, ...) to automatically close the issue when PR gets merged): fixes #

Public facing documentation PR (if applicable)

Special notes for reviewer:

Checklist:

• [x] Proper commit message prefix on all commits
• [ ] Updated the public facing documentation
• Is this changeset backwards compatible for existing clusters? Applying:
  • [x] is completely transparent, will not impact the workload in any way.
  • [ ] requires running a migration script.
  • [ ] requires draining and/or replacing nodes.
  • [ ] will break the cluster. I.e. full cluster migration is required.