Pass along transaction id to BMO API calls for linking back to the exact change in the revision history

Summary:
BMO will use the new data to add an achor to the revision link which will take the user directly
to the change in the revision UI.

Reviewers: davidwalsh

Reviewed By: davidwalsh

Bug #: 1399508

Differential Revision: https://phabricator.services.mozilla.com/D55