2 things needed to be fixed in virtual machine API:
1. adding provider field to show_vm - in order to be able to identify which compute resource, we are dealing with in hammer.
2. fixing the API for GCE - find_vm_by_uuid needs to get the full name in GCE and not the id.

The second issue is not really an issue. Apparently it didn't work before because of the problematic fields that were excluded in this fix. In addition, a comment was added to the hammer help documentation so that users will know how to use this command properly when dealing with GCE compute resource (use VM name instead of VM id).