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:

   http://git.samba.org/autobuild.flakey.sn-devel-144/2017-12-20-2210/flakey.log

The samba build logs are available here:

   http://git.samba.org/autobuild.flakey.sn-devel-144/2017-12-20-2210/samba.stderr
   http://git.samba.org/autobuild.flakey.sn-devel-144/2017-12-20-2210/samba.stdout
  
The top commit at the time of the failure was:

commit 676261fa08273114b888bb46f65de3de091b615b
Author: Jamie McClymont <jamiemcclymont at catalyst.net.nz>
Date:   Fri Dec 8 15:20:36 2017 +1300

    selftest: replace global with explicit environment variables
    
    This patch removes setting of NSS_WRAPPER and RESOLV_WRAPPER variables globally
    in Samba3.pm (because setting them persistently/globally can create hidden
    ordering dependencies). Instead, they are set on subprocesses as required, which
    appears to be the following two places (aside from those places where they are
    already set explicitly):
    * calls to createuser in provision
    * calls to wbinfo --ping-dc in wait_for_start
    
    Signed-off-by: Jamie McClymont <jamiemcclymont at catalyst.net.nz>
    Reviewed-by: Garming Sam <garming at catalyst.net.nz>
    Reviewed-by: Andrew Bartlett <abartlet at samba.org>
    
    Autobuild-User(master): Andrew Bartlett <abartlet at samba.org>
    Autobuild-Date(master): Wed Dec 20 08:50:26 CET 2017 on sn-devel-144