bump imgver in images now built with virt-install
    
    Summary:
    goes with the openqa_fedora_tools commit to switch from virt-
    builder to virt-install. That bumps all the imgvers, so we must
    update templates correspondingly.
    
    Test Plan: As per D917.
    
    Reviewers: garretraziel
    
    Reviewed By: garretraziel
    
    Subscribers: tflink
    
    Differential Revision: https://phab.qadevel.cloud.fedoraproject.org/D918