pass a proper 'version' value
    
    Summary:
    We can just parse the release out of the 'build' value, here.
    All tests still run properly because we use the * wildcard
    in the job groups and so on. Passing a proper 'version' value
    prevents T581: when you schedule jobs from an ISO, openQA
    will obsolete any running or scheduled jobs with the same
    DISTRI, FLAVOR, VERSION and ARCH.
    
    Test Plan:
    Schedule jobs for two composes at the same time
    (e.g. Branched and Rawhide), see that the second set does
    not obsolete the first. Make sure setting VERSION has no
    unexpected consequences.
    
    Reviewers: jskladan, garretraziel
    
    Reviewed By: garretraziel
    
    Subscribers: tflink
    
    Differential Revision: https://phab.qadevel.cloud.fedoraproject.org/D522