nfs4: fix secinfo_no_name operation

fix two test cases from pynfs testsuite

Acked-by: Gerd Behrmann
Target: master
nfs4: fix behavior on undefined operation

Undefined operation always convert into ILLEGAL.
fixes test cases from pynfs testsuite

Acked-by: Gerd Behrmann
Target: master

d
nfs4: fix parent lookup behavior on a symlink

fixes test cases from pynfs testsuite

Acked-by: Gerd Behrmann
Target: master
nfs4: fix open_claim after 'reclaim complete'

fixes test case from pynfs testsuite

Acked-by: Gerd Behrmann
Target: master
nfs4: fix regular open before 'reclaim complete'

fixes test case from pynfs testsuite

Acked-by: Gerd Behrmann
Target: master
nfsv4: fix regression introduced in 7e865b5

Acked-by: Gerd Behrmann
Target: master
nfs4: fix create_session of expired clients

fixes test case from pynfs testsuite

Acked-by: Gerd Behrmann
Target: master
nfsv41: add support for IO without pNFS

As dCache supports proxy-IO makes no sense
disable it in simulator.

fixes IO based tests from pynfs testsuite

Acked-by: Gerd Behrmann
Target: master