pass compose location into openQA
    
    Summary:
    this is necessary to allow tests to use the compose tree as a
    repository instead of the mirrors.
    
    Test Plan:
    Test with D989, this is needed for that. LOCATION
    openQA setting should be set for all tests.
    
    Reviewers: jskladan, garretraziel
    
    Reviewed By: garretraziel
    
    Subscribers: tflink
    
    Differential Revision: https://phab.qadevel.cloud.fedoraproject.org/D990