qa: resolve occassional "join is not sorted" qa/128 failure
qa: resolve occassional "join is not sorted" qa/128 failure

Resolve failure in 128 when nfs stats are activated, from:
"join: [...] is not sorted: nfs3_client_reqs_readdir 7" -
turned out to be "readdir+" sorting non-deterministically
with "readdir".  Canonicalise as readdirplus (like nfsstat
reports it) and all is well.

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