keycloak update to 7.1.8-bb.1

Package Merge Request

Package Changes

https://repo1.dso.mil/big-bang/product/packages/keycloak/-/blob/7.1.8-bb.1/CHANGELOG.md

Package MR

big-bang/product/packages/keycloak!338 (merged)

For Issue

Closes big-bang/product/packages/keycloak#287 (closed)

Upgrade Notices

The upstream Keycloak Iron Bank image has changed its default user from UID/GID 2000 to UID/GID 1000. If you have custom volume mounts, mounted configuration files, or persistent storage with ownership set to 2000:2000, you may need to update file permissions accordingly.