Fix unit tests

- Now ProviderContextSetupHelper.getProviderContext() invalidates DB cache

* MailboxAccountLoaderTestCase
- Save hostauth properly
- (ProviderContextSetupHelper invalidates cache before each test)

Bug 3280911

* SmtpSenderUnitTests
- Use ProviderContextSetupHelper to create isolated context,
  which now also invalidates DB cache

Bug 3280913

* MailboxFinderTest
- When kicking Controller.Result methods directly from tests,
  call the raw callback, rather than the one wrapped with
  ControllerResultUiThreadWrapper, to make it synchronous.

Bug 3280898

* MessageViewTest
- Disable testOpenMessage()
  This test doesn't work because it sets up test data in an isolated
  context but the activity/fragment don't see them because they
  use the real context.
  I have no idea why it worked before... Maybe because there were
  accounts/mailbox/message with the same ID in the DB by chance.

Bug 3280905

Change-Id: I6beb08c58fff102e90bebd2c35f70820268b9e62
5 files changed