selftest/flapping: mark samba4.nss.test using winbind(s3dc) as flakey

selftest/flapping: mark samba4.nss.test using winbind(s3dc) as flakey

I saw this at least 10 times in the last weeks.

[1425/1517 in 1h12m22s] samba4.nss.test using winbind(s3dc)
UNEXPECTED(failure): samba4.nss.test using winbind(s3dc).run nsstest(s3dc)
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

FAILED (1 failures, 0 errors and 0 unexpected successes in 0 testsuites)

metze

Autobuild-User(master): Stefan Metzmacher <metze@samba.org>
Autobuild-Date(master): Fri Jun 15 20:24:11 CEST 2012 on sn-devel-104