Propagate machine jobs from state to StartInstance

The provisioner is updated to send the correct set
of machine jobs from state through to the broker's
StartInstance call. This allows us to now expose and
load balance the correct set of ports for state
servers in Azure.

Fixes https://bugs.launchpad.net/juju-core/+bug/1347371
Merge pull request #373 from axw/1.20

Propagate machine jobs from state to StartInstance

The provisioner is updated to send the correct set
of machine jobs from state through to the broker's
StartInstance call. This allows us to now expose and
load balance the correct set of ports for state
servers in Azure.

Fixes https://bugs.launchpad.net/juju-core/+bug/1347371