[geary] (4 commits) Created branch wip/794174-conversation-monitor-max-cpu

[Michael Gratton <mjog src gnome org>]

The branch 'wip/794174-conversation-monitor-max-cpu' was created.

Summary of new commits:

  d76cf9d... Allow test fixtures and test methods to throw errors by def
  de352a7... Tidy up unit test infrastructure and mock classes.
  ace6cb8... Add a mock object mixin that can check call expectations on
  81dd1a7... Don't use the database for internal ConversationMonitor boo