message: Fix loginRealm to work on old and new Keycloak
diff: <![CDATA[
  <script id="environment" type="application/json">
  {
  - "loginRealm": "master",
  + "loginRealm": "${loginRealm!"master"}",
  "authServerUrl": "${authServerUrl}",
  "authUrl": "${authUrl}",
  "consoleBaseUrl": "${consoleBaseUrl}",
  