qa/547: don't run if an acceptable python version not installed
qa/547: don't run if an acceptable python version not installed

This test uses secure/crash-* which won't work with older versions
of Python ... leverage the "at least Python 2.6" requirement from
the build.

wuliming/pcp,aeg-aeg/pcpfans,adfernandes/pcp,aeg-aeg/pcpfans,adfernandes/pcp,aeg-aeg/pcpfans,wuliming/pcp,aeg-aeg/pcpfans,wuliming/pcp,aeg-aeg/pcpfans,adfernandes/pcp,wuliming/pcp,wuliming/pcp,aeg-aeg/pcpfans,adfernandes/pcp,wuliming/pcp,wuliming/pcp,wuliming/pcp,adfernandes/pcp,adfernandes/pcp,aeg-aeg/pcpfans,adfernandes/pcp,adfernandes/pcp,aeg-aeg/pcpfans