Add Savanna-related configs for testing

Currently we're only need to expose catalog_type config.

Change-Id: I29bc1d91adc7098cdc162146ccabe6197162faf0
Fix the help message for run_ssh

Change-Id: I3101f68386420479172d51bca5ee658099f9a323
Merge "Fix the help message for run_ssh"
Merge "Add Savanna-related configs for testing"