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-144/2017-07-26-0012/flakey.log

The samba build logs are available here:

   http://git.samba.org/autobuild.flakey.sn-devel-144/2017-07-26-0012/samba.stderr
   http://git.samba.org/autobuild.flakey.sn-devel-144/2017-07-26-0012/samba.stdout
  
The top commit at the time of the failure was:

commit e6846584d744974ca1256e52507ba09cc3ffa0ad
Author: Volker Lendecke <vl at samba.org>
Date:   Wed Jul 5 19:26:22 2017 +0200

    messaging: Remove "struct messaging_backend"
    
    Signed-off-by: Volker Lendecke <vl at samba.org>
    Reviewed-by: Ralph Boehme <slow at samba.org>
    
    Autobuild-User(master): Ralph Böhme <slow at samba.org>
    Autobuild-Date(master): Tue Jul 25 21:35:49 CEST 2017 on sn-devel-144