Revert "Give `systemctl stop ipa.service` longer due to RHBZ #2100282"
    
    This reverts commit b203f41f55a4c918b8a0bff1f6fda851360071bb.
    The bug has been worked around for some time with a downstream
    patch. Dropping the extended timeout means we'll notice if the
    workaround is dropped prematurely or stops working.