add a database server role test (and client test)
    
    Summary:
    Pretty straightforward tests which deploy the database
    server role and exercise it a bit.
    
    Test Plan: Run the tests, check they work properly.
    
    Reviewers: jskladan, garretraziel
    
    Reviewed By: garretraziel
    
    Subscribers: tflink
    
    Differential Revision: https://phab.qadevel.cloud.fedoraproject.org/D991