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-184/2019-06-13-1031/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-184/2019-06-13-1031/samba-ad-dc-6.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-184/2019-06-13-1031/samba-ad-dc-6.stdout
  
The top commit at the time of the failure was:

commit fef8ec20d0f591f2e531a649108ca83c5a4fd744
Author: Gary Lockyer <gary at catalyst.net.nz>
Date:   Thu Jun 13 08:49:16 2019 +1200

    lib ldb ldb_key_value: csbuild unused parm ldb_kv
    
    Fixes csbuild error.
    
    Error: COMPILER_WARNING:
    lib/ldb/ldb_key_value/ldb_kv_search.c: scope_hint: In
    function ‘search_func’ lib/ldb/ldb_key_value/ldb_kv_search.c:308:47:
    warning: unused parameter ‘ldb_kv’ [-Wunused-parameter]
    
    Signed-off-by: Gary Lockyer <gary at catalyst.net.nz>
    Reviewed-by: Andreas Schneider <asn at samba.org>
    
    Autobuild-User(master): Andreas Schneider <asn at cryptomilk.org>
    Autobuild-Date(master): Thu Jun 13 08:27:12 UTC 2019 on sn-devel-184

and the last 50 lines of the stdout log were:

-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
badPwdCount = '3'
lockoutTime = '132048954316539820'
badPasswordTime = '132048954316539820'
logonCount = '4'
lastLogon = '132048954284774520'
lastLogonTimestamp = '132048954196633740'
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kerberos credentials (kerberos required): kinit for lockout1krb5 at SAMBA.EXAMPLE.COM failed (Clients credentials have been revoked)

Account locked out: kinit for lockout1krb5 at SAMBA.EXAMPLE.COM failed (Clients credentials have been revoked)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 = '132048954316539820'
badPasswordTime = '132048954316539820'
logonCount = '4'
lastLogon = '132048954284774520'
lastLogonTimestamp = '132048954196633740'
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/b2908013/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/b2908013/samba-ad-dc-6/source4/dsdb/tests/python/password_lockout_base.py", line 549, in _test_login_lockout
    self.fail()
AssertionError: None

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) -> 520
samba4.ldap.confidential_attr.python(ad_dc_slowtests)(ad_dc_slowtests) -> 346
samba4.rpc.samr.passwords.lockout on ncacn_np with (ad_dc_slowtests) -> 241
samba4.rpc.samr.passwords.pwdlastset on ncacn_np with (ad_dc_slowtests) -> 216
samba4.rpc.samlogon on ncacn_np with (ad_dc_slowtests) -> 72
samba4.rpc.samr.passwords.badpwdcount on ncacn_np with (ad_dc_slowtests) -> 26
samba4.rpc.samr.passwords on ncacn_np with (ad_dc_slowtests) -> 26
samba4.rpc.samr.large-dc on ncacn_np with (ad_dc_slowtests) -> 22
samba4.rpc.samr.users on ncacn_np with (ad_dc_slowtests) -> 11
samba4.rpc.samr.users.privileges on ncacn_np with (ad_dc_slowtests) -> 5
ERROR: test failed with exit code 1
Makefile:16: recipe for target 'test' failed