Retry ssh connections on auth failure.
Retry ssh connections on auth failure.

Some cloud instance types (Fedora for example) create
the ssh user after sshd comes online. This allows
our ssh connection retry loop to handle this scenario
gracefully.

Change-Id: Ie345dea50fc2983112cd2e72826a708583d2712a

citrix-openstack/nodepool,seandst/nodepool,seandst/nodepool,Tesora/tesora-nodepool,citrix-openstack/nodepool,Tesora/tesora-nodepool