POSIX states that open("foo", O_CREAT|O_RDONLY, 000) should succeed if
the file "foo" does not already exist. With the current NFS client,
it will fail with an EACCES error because of the permissions checks in
nfs4_opendata_access().

Fix is to turn that test off if the server says that we created the file.
Reported-by: N"Frank S. Filz" <ffilzlnx@mindspring.com>
Signed-off-by: NTrond Myklebust <trond.myklebust@primarydata.com>