Best fit for cloud instances via Automate State Machine

https://bugzilla.redhat.com/show_bug.cgi?id=1132688

This is just the database cleanup changes, it has nothing directly
related to this PR. It is a cleanup that was missed in earlier PR.
Automate DB changes for Cloud Placement via State Machine

https://bugzilla.redhat.com/show_bug.cgi?id=1132688

This is just the Automate DB changes
Model & Dialog Changes for Placement via State Machine

https://bugzilla.redhat.com/show_bug.cgi?id=1132688
Merge pull request #441 from mkanoor/cloud_instance_best_fit

Cloud instance best fit via Automate State Machine