add ssh client so rancid can interact with remote devices
add ssh client so rancid can interact with remote devices

Resolves https://github.com/jumanjihouse/docker-rancid-git/issues/11

jumanjihouse/docker-rancid-git,jumanjiman/docker-rancid-git,jumanjihouse/docker-rancid-git,jumanjiman/docker-rancid-git