autobuild[sn-devel-104]: intermittent test failure detected

The autobuild test system (on sn-devel-104) 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-104/2017-01-01-0404/flakey.log

The samba build logs are available here:

   http://git.samba.org/autobuild.flakey.sn-devel-104/2017-01-01-0404/samba.stderr
   http://git.samba.org/autobuild.flakey.sn-devel-104/2017-01-01-0404/samba.stdout
  
The top commit at the time of the failure was:

commit 2e1dc952f0505154f649c04da4b2194f433a6cbe
Author: Volker Lendecke <[email protected]>
Date:   Tue Dec 27 13:08:58 2016 +0000

    idmap4: Use sid_check_is_in_unix_groups()
    
    This avoids the need for the special unix groups sid
    
    Signed-off-by: Volker Lendecke <[email protected]>
    Reviewed-by: Uri Simchoni <[email protected]>
    
    Autobuild-User(master): Uri Simchoni <[email protected]>
    Autobuild-Date(master): Thu Dec 29 00:05:25 CET 2016 on sn-devel-144