Update Review Board to use the new avatar services APIs

Review Request #8480 — Created Oct. 20, 2016 and submitted — Latest diff uploaded

Information

Review Board
release-3.0.x

Reviewers

This patch updates avatar services tests to use the new avatar services
registry API from r/8479. It also updates the user API and user
datagrid column to use the newer AvatarServicesRegistry.for_user
method to retrieve their preferred avatar service.

  • Ran unit tests.
  • Verified that avatar configuration still works.
  • Verified that avatar admin configuration still works.