autobuild[sn-devel-144]: intermittent test failure detected

[autobuild]

The autobuild test system (on sn-devel-144) 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-144/2019-03-12-1319/flakey.log

The failure seems to be in the "samba-ad-dc-6" suite, whose build logs are available here:

   https://git.samba.org/autobuild.flakey.sn-devel-144/2019-03-12-1319/samba-ad-dc-6.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2019-03-12-1319/samba-ad-dc-6.stdout
  
The top commit at the time of the failure was:

commit a68e8af2d1b92ba9a94fc7cc1eb98cdca687d5fd
Author: Tim Beale <timbeale at catalyst.net.nz>
Date:   Mon Mar 11 16:03:34 2019 +1300

    testsuite: Remove build_farm testsuites
    
    This test code is not run (and has not been run for about a decade).
    Let's remove it - it's there in the git history if we ever want to try
    to repurpose it again.
    
    Signed-off-by: Tim Beale <timbeale at catalyst.net.nz>
    Reviewed-by: Andrew Bartlett <abartlet at samba.org>
    
    Autobuild-User(master): Andrew Bartlett <abartlet at samba.org>
    Autobuild-Date(master): Tue Mar 12 02:56:05 UTC 2019 on sn-devel-144

and the last 50 lines of the stdout log were:

badPwdCount = '3'
lockoutTime = '131968667401489700'
badPasswordTime = '131968667401489700'
logonCount = '4'
lastLogon = '131968667363672610'
lastLogonTimestamp = '131968667262485050'
userAccountControl = '512'
msDS-User-Account-Control-Computed = '16'
Failed to get kerberos credentials (kerberos required): kinit for lockout1krb5 at SAMBA.EXAMPLE.COM failed (Clients credentials have been revoked)

Account locked out: kinit for lockout1krb5 at SAMBA.EXAMPLE.COM failed (Clients credentials have been revoked)

gensec_spnego_create_negTokenInit_step: gssapi_krb5: creating NEG_TOKEN_INIT for ldap/localdc failed (next[(null)]): NT_STATUS_ACCOUNT_LOCKED_OUT
Failed to bind - LDAP client internal error: NT_STATUS_ACCOUNT_LOCKED_OUT
Failed to connect to 'ldap://localdc' with backend 'ldap': LDAP client internal error: NT_STATUS_ACCOUNT_LOCKED_OUT
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
badPwdCount = '3'
lockoutTime = '131968667401489700'
badPasswordTime = '131968667401489700'
logonCount = '4'
lastLogon = '131968667363672610'
lastLogonTimestamp = '131968667262485050'
userAccountControl = '512'
msDS-User-Account-Control-Computed = '16'
UNEXPECTED(failure): samba4.ldap.password_lockout.python(ad_dc_slowtests).__main__.PasswordTestsWithSleep.test_pso_login_lockout_krb5(ad_dc_slowtests)
REASON: Exception: Exception: Traceback (most recent call last):
  File "/memdisk/autobuild/fl/b3649357/samba-ad-dc-6/source4/dsdb/tests/python/password_lockout.py", line 1172, in test_pso_login_lockout_krb5
    self._test_login_lockout(self.lockout1krb5_creds)
  File "/memdisk/autobuild/fl/b3649357/samba-ad-dc-6/source4/dsdb/tests/python/password_lockout_base.py", line 562, in _test_login_lockout
    msDSUserAccountControlComputed=dsdb.UF_LOCKOUT)
  File "/memdisk/autobuild/fl/b3649357/samba-ad-dc-6/source4/dsdb/tests/python/password_lockout_base.py", line 180, in _check_account
    self.assertEquals(uinfo5.bad_password_count, effective_bad_password_count)
AssertionError: 0 != 3

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
samba4.ldap.vlv.python(ad_dc_slowtests)(ad_dc_slowtests) -> 893
samba4.ldap.confidential_attr.python(ad_dc_slowtests)(ad_dc_slowtests) -> 700
samba4.rpc.samr.passwords.lockout on ncacn_np with (ad_dc_slowtests) -> 254
samba4.rpc.samr.passwords.pwdlastset on ncacn_np with (ad_dc_slowtests) -> 222
samba.tests.emulate.traffic_packet(ad_dc_slowtests) -> 198
samba4.rpc.samlogon on ncacn_np with (ad_dc_slowtests) -> 112
samba.tests.blackbox.traffic_replay(ad_dc_slowtests) -> 55
samba4.rpc.samr.passwords on ncacn_np with (ad_dc_slowtests) -> 44
samba4.rpc.samr.passwords.badpwdcount on ncacn_np with (ad_dc_slowtests) -> 41
samba4.rpc.samr.large-dc on ncacn_np with (ad_dc_slowtests) -> 22
ERROR: test failed with exit code 1