Add unit tests to cover PhabricatorMailReceiver::matchAddresses()

Summary: Ref T3183. We should accept addresses like "New Bug" <bugs@example.com> to match bugs@example.com.

Test Plan: Ran unit tests.

Reviewers: btrahan

Reviewed By: btrahan

CC: aran

Maniphest Tasks: T3183

Differential Revision: https://secure.phabricator.com/D5923