Set persistent entity map

[froboy]

Do not merge PR, only review it and approve/request changes. Merge is allowed by QA Engineer only.

Related Issue/Ticket:

PLEASE CHECK BASE BRANCH FOR YOUR PR ONLY urgent and approved fixes for point release should go to master branch

https://github.com/ymcatwincities/openy_gated_content/issues/177

Steps to test:

This is challenging to test without first breaking your db by editing one of the entity.definitions.bundle_field_map rows in the key_value table.

Quality checks:

Please check these boxes to confirm this PR covers the following cases:

• Maintaining our upgrade path is essential. Check one or the other:
  • [ ] This PR provides updates via hook_update_N or other means.
  • [ ] No updates are necessary for this change.
• Front end fixes should be tested against all of the Open Y Themes.
  • [ ] Tested against Carnation
  • [ ] Tested against Lily
  • [ ] Tested against Rose
  • [ ] This change does not contain front-end fixes.
• [ ] I have flagged this PR "Needs Review" or pinged the VY devs/QA team in Slack

[froboy]

Made against the wrong fork.