Log warnings when juju status output doesn't provide a public-address for certain juju units.
This branch marks suck units with NO_PUBLIC_ADDRESS so Juju.ssh_args, Juju.pull_args and Juju.push_args can fall back to trying "juju ssh " instead of "ssh ubuntu@" .
Log warnings when juju status output doesn't provide a public-address for certain juju units.
This branch marks suck units with NO_PUBLIC_ADDRESS so Juju.ssh_args, Juju.pull_args and Juju.push_args can fall back to trying "juju ssh" instead of "ssh ubuntu@" .
This addresses Issue #6