autobuild[sn-devel-144]: intermittent test failure detected

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-144/2017-01-12-1517/flakey.log

The samba build logs are available here:

   http://git.samba.org/autobuild.flakey.sn-devel-144/2017-01-12-1517/samba.stderr
   http://git.samba.org/autobuild.flakey.sn-devel-144/2017-01-12-1517/samba.stdout
  
The top commit at the time of the failure was:

commit 7794497bc909fa7b02da9d9ce1fc496a8fa2a9ae
Author: Amitay Isaacs <[email protected]>
Date:   Fri Dec 2 15:11:20 2016 +1100

    ctdb-tests: Add robust mutex test
    
    BUG: https://bugzilla.samba.org/show_bug.cgi?id=12469
    
    This demonstrates robust mutex bug on linux/glibc system.
    
    Signed-off-by: Amitay Isaacs <[email protected]>
    Reviewed-by: Martin Schwenke <[email protected]>
    
    Autobuild-User(master): Amitay Isaacs <[email protected]>
    Autobuild-Date(master): Thu Jan 12 07:59:34 CET 2017 on sn-devel-144