New version 28.17-1
    
    - Modules should use the proxy pattern. (vponcova)
    - Variants need to be instances of the Variant class (vponcova)
    - kickstart: support firewall --use-system-defaults (#1526450) (dusty)
    - Check payload is set before accessing its data (#1524785) (mkolman)
    - Do not fail when test are failing in setup-env script (jkonecny)
    - Support running multiple commands at once (jkonecny)
    - Support copy Anaconda result dir out of mock (jkonecny)
    - Remove dependencies from Makefile (jkonecny)
    - Add path to Anaconda in mock to constant (jkonecny)
    - Properly exclude packages from the install set (ngompa13)
    - Add the _prepare_command helper function to setup-test-env (jkonecny)
    - Add run-tests parameter to setup-test-env script (jkonecny)
    - Remove /anaconda in mock before copying new one (jkonecny)