Hammer CLI

Cloned from https://bugzilla.redhat.com/show_bug.cgi?id=1937470

Description of problem:
hammer host update does not update a specific host.
example: # hammer host update --id 39 --compute-resource VMWARE

Even if the host id is specified, all the VMs get associated to the VMware mentioned as the Compute resource.

Actual results:
All the guest VMs get updated.

Expected results:
Only a specific VM should be updated.