Flesh out the SSH code more
Flesh out the SSH code more

Notably add user key management
and start poking things in
/var/lib/confluent

jjohnson42/confluent,xcat2/confluent,jjohnson42/confluent,xcat2/confluent,xcat2/confluent,jjohnson42/confluent,jjohnson42/confluent,xcat2/confluent,jjohnson42/confluent,xcat2/confluent