Fixes CA always being presented as running
    
    Even after manually stopping the pki-tomcatd service instance the
    service's is_running() method would still return True.
    
    https://fedorahosted.org/freeipa/ticket/5898
    
    Reviewed-By: Martin Basti <mbasti@redhat.com>
    Reviewed-By: Jan Cholasta <jcholast@redhat.com>