autobuild: intermittent test failure detected

[autobuild]

The autobuild test system 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/2015-05-19-1958/flakey.log

The samba build logs are available here:

   http://git.samba.org/autobuild.flakey/2015-05-19-1958/samba.stderr
   http://git.samba.org/autobuild.flakey/2015-05-19-1958/samba.stdout
  
The top commit at the time of the failure was:

commit 4e1cc54c222f6274f28fec39579655b62ab73f2c
Author: Stefan Metzmacher <metze at samba.org>
Date:   Thu Sep 18 22:54:23 2014 +0200

    s3:tevent_wait: simplify the code by using tevent_req_defer_callback()
    
    This way a user of this could also use tevent_req_error() or wrappers.
    
    Signed-off-by: Stefan Metzmacher <metze at samba.org>
    Reviewed-by: Michael Adam <obnox at samba.org>
    
    Autobuild-User(master): Stefan Metzmacher <metze at samba.org>
    Autobuild-Date(master): Tue May 19 16:37:52 CEST 2015 on sn-devel-104