pmdaproc.sh: rework the duplictes in PMNS check
pmdaproc.sh: rework the duplictes in PMNS check

Python and Perl PMDAs do not have a "root" PMNS file, so generalize
the check to use the root file if it exists, else if a pmns file
exists (as in the case of Perl and Python PMDAs), then syntesize
a root file that #includes the pmns file and use that, else skip
the test.

edwardt/pcp,adfernandes/pcp,prasincs/pcp,adfernandes/pcp,wuliming/pcp,andyvand/cygpcpfans,prasincs/pcp,tjanez/pcp,tjanez/pcp,aeg-aeg/pcpfans,andyvand/cygpcpfans,wuliming/pcp,edwardt/pcp,adfernandes/pcp,wuliming/pcp,prasincs/pcp,andyvand/cygpcpfans,wuliming/pcp,edwardt/pcp,wuliming/pcp,aeg-aeg/pcpfans,aeg-aeg/pcpfans,wuliming/pcp,aeg-aeg/pcpfans,tjanez/pcp,tjanez/pcp,prasincs/pcp,adfernandes/pcp,andyvand/cygpcpfans,edwardt/pcp,edwardt/pcp,prasincs/pcp,prasincs/pcp,tjanez/pcp,edwardt/pcp,prasincs/pcp,aeg-aeg/pcpfans,edwardt/pcp,tjanez/pcp,adfernandes/pcp,aeg-aeg/pcpfans,tjanez/pcp,andyvand/cygpcpfans,aeg-aeg/pcpfans,adfernandes/pcp,wuliming/pcp,prasincs/pcp,tjanez/pcp,adfernandes/pcp,wuliming/pcp,edwardt/pcp,aeg-aeg/pcpfans,andyvand/cygpcpfans,andyvand/cygpcpfans,adfernandes/pcp,andyvand/cygpcpfans