Keycloak: Update BB Base to 2.0.0

Package Merge Request

Package Changes

https://repo1.dso.mil/platform-one/big-bang/apps/security-tools/keycloak/-/blob/18.1.1-bb.6/CHANGELOG.md

Package MR

https://repo1.dso.mil/platform-one/big-bang/apps/security-tools/keycloak/-/merge_requests/78

For Issue

For https://repo1.dso.mil/platform-one/big-bang/bigbang/-/issues/1233