keycloak update to 7.1.9-bb.2

Package Merge Request

Package Changes

https://repo1.dso.mil/big-bang/product/packages/keycloak/-/blob/7.1.9-bb.2/CHANGELOG.md

Package MR

big-bang/product/packages/keycloak!344 (merged)

For Issue

Closes big-bang/product/packages/keycloak#293 (closed)

Upgrade Notices

This is a major Keycloak release. While there are no breaking changes specific to the chart shipped with Big Bang, there may be breaking changes specific to your Keycloak configuration. Please see the breaking changes section from the official Keycloak upgrading guide for more information.