Libmozevent

- bus: Log skipping of output message creation in bus.run only when an output queue is defined (25)
- bus: Add an option to bus.run to run parsing tasks in parallel (26)

Use "/" virtualhost for AMQP by default

Use empty virtualhost for AMQP by default

- pulse: Check if the connection is alive every 7 seconds instead of all the time (16)
- pulse: Support listening on multiple queues and routes on the same pulse connection (19)
- pulse: Support connecting to an AMQP virtual host (22)
- mercurial: Send the revision too along with the Treeherder URL when a try push is done (18)

- Use Taskcluster local configuration - backport from code-review (13)
- Update pre-commit dependencies (14)

- Migrate to Community-TC (10)
- Fix default Taskcluster root URL to match the new firefox-ci deployment
- Stop reading the hosts file to set the Taskcluster root URL