qa/1188: add extra _notrun checks
qa/1188: add extra _notrun checks

if /dev/mapper doesn't exist or exists but only has one file
in it ('control'), no point running the test.

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