Code review comment for lp:~axwalk/juju-core/lp1306902-ha-upgrade-take2

Reviewers: mp+216245_code.launchpad.net,

Message:
Please take a look.

Description:
HA: upgrade upstart and initiate replset

The machine agent will now upgrade the
Mongo upstart script and initiate the
replicaset when upgrading from a version
prior to 1.19.0.

Tested upgrading 1.18.1 to 1.19.1 with and
without HA enabled; tested straight bootstrap
to 1.19.1 with and without HA enabled.

(Supersedes https://codereview.appspot.com/88350043/)

https://code.launchpad.net/~axwalk/juju-core/lp1306902-ha-upgrade-take2/+merge/216245

(do not edit description out of merge proposal)

Please review this at https://codereview.appspot.com/88790043/

Affected files (+153, -66 lines):
   A [revision details]
   M agent/format-1.18.go
   M agent/mongo/mongo.go
   M cmd/jujud/bootstrap.go
   M cmd/jujud/machine.go
   M cmd/jujud/machine_test.go
   M worker/peergrouper/desired_test.go
   M worker/peergrouper/initiate.go
   M worker/peergrouper/initiate_test.go
   A worker/peergrouper/suite_test.go