Fix authentication backends.
Review Request #10045 — Created June 28, 2018 and submitted
BaseAuthBackend.get_user()was removed with commit:a12a370fd - Modernize the documentation for BaseAuthBackend.
The function is called by Django when the user is authenticated and
Also, the Active Directory backend needed fixing.
- Created Docker container form easybe/alpine-reviewboard:wip
- Successfully logged in with Active Directory credentials