selftest/flapping: samba4.nss.test is also flakey for s3member

selftest/flapping: samba4.nss.test is also flakey for s3member

[1426/1518 in 1h24m58s] samba4.nss.test using winbind(s3member)
UNEXPECTED(failure): samba4.nss.test using winbind(s3member).run nsstest(s3member)
REASON: _StringException: _StringException: ERROR setpwent: NSS_STATUS=-1  1 (nss_errno=0)
ERROR getpwent: NSS_STATUS=-1  1 (nss_errno=0)
ERROR endpwent: NSS_STATUS=-1  1 (nss_errno=0)
ERROR setgrent: NSS_STATUS=-1  1 (nss_errno=0)
ERROR getgrent: NSS_STATUS=-1  1 (nss_errno=0)
ERROR endgrent: NSS_STATUS=-1  1 (nss_errno=0)
ERROR Non existent user gave error -1
ERROR Non existent uid gave error -1
ERROR Non existent group gave error -1
ERROR Non existent gid gave error -1
total_errors=10

metze

Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Mon Jun 18 17:59:25 CEST 2012 on sn-devel-104