qa/956: tighter cleanup
qa/956: tighter cleanup

We were seeing cases where the "dynamic" (QA) PMDA was not configured
in pmcd.conf, but the dynamic.* names were still in the PMNS ... use
a second, bigger, stick in _cleanup() if needed.

adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp