autobuild[sn-devel-184]: intermittent test failure detected

[autobuild]

The autobuild test system (on sn-devel-184) has detected an intermittent failing test in 
the current master tree.

The autobuild log of the failure is available here:

   https://git.samba.org/autobuild.flakey.sn-devel-184/2019-04-03-2202/flakey.log

The failure seems to be in the "samba-none-env" suite, whose build logs are available here:

   https://git.samba.org/autobuild.flakey.sn-devel-184/2019-04-03-2202/samba-none-env.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-184/2019-04-03-2202/samba-none-env.stdout
  
The top commit at the time of the failure was:

commit 377d27359ccdb8f2680fda36ca388f44456590e5
Author: Günther Deschner <gd at samba.org>
Date:   Tue Apr 2 13:16:55 2019 +0200

    s3-libnet_join: allow fallback to NTLMSSP auth in libnet_join
    
    When a non-DNS and non-default admin domain is provided during the join
    sometimes we might not be able to kinit with 'user at SHORTDOMAINNAME'
    (e.g. when the winbind krb5 locator is not installed). In that case lets
    fallback to NTLMSSP, like we do in winbind.
    
    BUG: https://bugzilla.samba.org/show_bug.cgi?id=13861
    
    Guenther
    
    Signed-off-by: Guenther Deschner <gd at samba.org>
    Reviewed-by: Andreas Schneider <asn at samba.org>
    
    Autobuild-User(master): Andreas Schneider <asn at cryptomilk.org>
    Autobuild-Date(master): Wed Apr  3 18:57:31 UTC 2019 on sn-devel-144

and the last 50 lines of the stdout log were:

[198(3472)/228 at 31m12s] pidl.wireshark-ndr
[199(3512)/228 at 31m12s] tdb.python
[200(3566)/228 at 31m12s] samba.tests.dsdb_lock
[201(3573)/228 at 32m27s] samba.tests.samba_tool.visualize
[202(3584)/228 at 32m30s] samba.tests.samba_tool.provision_password_check
[203(3588)/228 at 32m38s] samba.tests.samba_tool.help
[204(3589)/228 at 33m46s] samba.tests.domain_backup_offline
[205(3593)/228 at 35m15s] samba.tests.lsa_string
[206(3597)/228 at 35m15s] samba.tests.loadparm
[207(3600)/228 at 35m15s] samba4.blackbox.samba3dump
[208(3601)/228 at 35m15s] samba4.blackbox.upgrade
[209(3609)/228 at 35m42s] samba4.blackbox.provision.py
[210(3616)/228 at 36m32s] samba4.blackbox.supported_features
[211(3622)/228 at 36m42s] samba4.blackbox.start_backup
[212(3625)/228 at 36m51s] samba4.blackbox.upgradeprovision.current
[213(3632)/228 at 37m59s] samba4.blackbox.setpassword.py
[214(3638)/228 at 38m13s] samba4.blackbox.newuser.py
[215(3649)/228 at 38m31s] samba4.blackbox.group.py
[216(3678)/228 at 39m1s] samba4.blackbox.provision-backend
[217(3682)/228 at 39m12s] samba4.blackbox.renamedc.sh
[218(3693)/228 at 39m43s] samba4.dsdb.samdb.ldb_modules.unique_object_sids
[219(3699)/228 at 39m43s] samba4.dsdb.samdb.ldb_modules.encrypted_secrets.tdb
[220(3714)/228 at 39m44s] samba4.dsdb.samdb.ldb_modules.encrypted_secrets.mdb
[221(3729)/228 at 39m44s] lib.audit_logging.audit_logging
[222(3744)/228 at 39m44s] lib.audit_logging.audit_logging.errors
[223(3758)/228 at 39m44s] samba4.dsdb.samdb.ldb_modules.audit_util
[224(3775)/228 at 39m44s] samba4.dsdb.samdb.ldb_modules.audit_log
[225(3797)/228 at 39m45s] samba4.dsdb.samdb.ldb_modules.audit_log.errors
[226(3802)/228 at 39m45s] samba4.dsdb.samdb.ldb_modules.group_audit
UNEXPECTED(failure): samba4.dsdb.samdb.ldb_modules.group_audit.test_audit_group_json(none)
REASON: Exception: Exception: time stamp "2019-04-03T22:01:53.001209+0000" is after finish time "2019-04-03T22:01:52"
../../source4/dsdb/samdb/ldb_modules/tests/test_group_audit.c:846: error: Failure!

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

A summary with detailed information can be found in:
  ./bin/ab/summary
TOP 10 slowest tests
samba.tests.docs -> 436
samba4.blackbox.upgradeprovision.alpha13 -> 167
samba4.blackbox.upgradeprovision.release-4-0-0 -> 158
samba4.blackbox.schemaupgrade -> 117
samba4.blackbox.dbcheck.release-4-1-0rc3 -> 100
samba4.blackbox.dbcheck.release-4-1-0rc3.quick -> 100
samba4.blackbox.dbcheck.release-4-0-0.quick -> 96
samba4.blackbox.dbcheck.release-4-0-0 -> 94
samba.tests.domain_backup_offline -> 88
samba.tests.dsdb_lock -> 74
ERROR: test failed with exit code 1
Makefile:16: recipe for target 'test' failed