Description of problem:Currently there is no option to update libvirt compute resources "display type" using hammer command.

Version-Release number of selected component (if applicable): 6.1.8

As per below help command there is not option to set "display type" of compute resource.

# hammer compute-resource update --help
Usage:
    hammer compute-resource update [OPTIONS]

Options:
 --description DESCRIPTION                    
 --id ID                                      
 --location-ids LOCATION_IDS                 Comma separated list of values.
 --locations LOCATION_NAMES                  Comma separated list of values.
 --name NAME                                 Compute resource name
 --new-name NEW_NAME                          
 --organization-ids ORGANIZATION_IDS         organization ID
                                             Comma separated list of values.
 --organizations ORGANIZATION_NAMES          Comma separated list of values.
 --password PASSWORD                         Password for RHEV, EC2, Vmware, Openstack. Secret key for EC2
 --provider PROVIDER                         Providers include 
 --region REGION                             for EC2 only
 --server SERVER                             for Vmware
 --set-console-password SET_CONSOLE_PASSWORD for Libvirt and Vmware only
                                             One of true/false, yes/no, 1/0.
 --tenant TENANT                             for Openstack only
 --url URL                                   URL for Libvirt, RHEV, and Openstack
 --user USER                                 Username for RHEV, EC2, Vmware, Openstack. Access Key for EC2.
 --uuid UUID                                 for RHEV, Vmware Datacenter
 -h, --help                                  print help

Actual results:
There must be a option to update display type of compute resource.