feat: add retries to ssh_connection

Some environments do not have a stable provisioning network and it is
common to observe

```
Data could not be sent to remote host "10.144.0.174". Make sure this
host can be reached over ssh: ssh: connect to host 10.144.0.174
port 22: No route to host
```

By setting `retries` in `ssh_connection` these outages have not be
observed.

Signed-off-by: Jack Hodgkiss <jack@stackhpc.com>

Author: jackhodgkiss

etc/kayobe/ansible.cfg

@@ -20,3 +20,4 @@ any_unparsed_is_failed = True
 [ssh_connection]
 pipelining = True
 ssh_extra_args = -o ControlPersist=1h
+retries = 3