Describe the bug
When tk8 is run in a directory which does not have config.yaml, it tries to auto generate it by saying:

No default config was provided. Generating one for you.

The auto-generated config.yaml is only usable for aws provisioner and not for others.

To Reproduce
Steps to reproduce the behavior:

1. Download tk8 binary in empty folder.
2. Setup cattle-

There's a ssh_config fixture to simplify things a bit:

def given_check_pod_status(ssh_config, host, k8s_client, label, expected_status):

Originally posted by @gdemonet in scality/metalk8s#2369