Add some sanity checks to orphaned_vms.sh
Add some sanity checks to orphaned_vms.sh

Bail out of no VMs or tenants are found, as there is no point in
continuing.

fzylogic/os-maintenance-tools,dreamhost/os-maintenance-tools,drwahl/os-maintenance-tools,dreamhost/os-maintenance-tools,fzylogic/os-maintenance-tools,drwahl/os-maintenance-tools,dreamhost/os-maintenance-tools,drwahl/os-maintenance-tools,fzylogic/os-maintenance-tools