test/nfs/nfs-dir has different results between 2.3.1 and 2.3.2

[Yu, Mingli]

Hi Experts,

With the same system and same configuration, the test "test/nfs/nfs-dir" 
has different results between 2.3.1 and 2.3.2.

The test pass in acl 2.3.1, but failed as below with acl 2.3.2. Any 
hints? Thanks!
[10] $ umask 022 -- ok
[11] $ mkdir /tmp/acl-ptest/test/test -- ok
[12] $ echo blah > /tmp/acl-ptest/test/test/blah -- ok
[16] $ su bin -- failed
su: user bin does not exist           != ~
[17] $ cat /tmp/acl-ptest/test/test/blah -- ok
[22] $ su -- failed
su: user root does not exist          != ~
[23] $ chmod go-rwx /tmp/acl-ptest/test/test -- ok
[24] $ setfacl -m u:bin:rx /tmp/acl-ptest/test/test -- ok
[25] $ ls -dl /tmp/acl-ptest/test/test | awk '{print $1, $3, $4}' -- ok
[27] $ getfacl --omit-header /tmp/acl-ptest/test/test 2> /dev/null -- ok
[38] $ su bin -- failed
su: user bin does not exist           != ~
[39] $ cat /tmp/acl-ptest/test/test/blah -- ok
[41] $ sleep 3 -- ok
[42] $ cat /tmp/acl-ptest/test/test/blah -- ok
[44] $ cat /tmp/acl-ptest/test/test/blah -- ok
[49] $ su -- failed
su: user root does not exist          != ~
[50] $ rm -rf /tmp/acl-ptest/test/test -- ok
17 commands (13 passed, 4 failed)
XFAIL test/nfs/nfs-dir.test (exit status: 4)


Thanks,