Do NFS4 OPEN_CONFIRM4 only for protocol 4.0

Ganesha was telling the client to do open confirm which is
not allowed in 4.1

Signed-off-by: Marc Eshel <eshel@us.ibm.com>
Signed-off-by: Adam C. Emerson <aemerson@linuxbox.com>
Signed-off-by: Jim Lieb <jlieb@panasas.com>
Merge remote-tracking branch 'linuxbox2/next' into cthon13_merge

Cthon 2013 Monday daily merge
Get rid of spurious major errors in filehandle checks

And clean up filehandle management a bit.

Signed-off-by: Adam C. Emerson <aemerson@linuxbox.com>