ff24f36 beaker: ensure PID1 zombie reaping in docker env

Authored and Committed by praiskup 6 days ago
    beaker: ensure PID1 zombie reaping in docker env
    
    The sleep binary can not reap zombies, but bash can.  We use `-it`
    arguments for starting the container, so the shell shouldn't just shut
    down.
    
    Merges: #1504