### Jira My PR addresses the following [AIRFLOW-3151](https://issues.apache.org/jira/browse/AIRFLOW-3151)
### Description The PR pins the version of FlaskAppBuilder to 1.11.1 since the new release 1.12.0 breaks the www_rbac UI. ### Tests Doesn't require additional tests because not adding any code to source, just pinning flaskappbuilder like flask-admin is pinned. [ Full content available at: https://github.com/apache/incubator-airflow/pull/3996 ] This message was relayed via gitbox.apache.org for [email protected]
