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-144/2016-12-09-1527/flakey.log

The samba build logs are available here:

   http://git.samba.org/autobuild.flakey.sn-devel-144/2016-12-09-1527/samba.stderr
   http://git.samba.org/autobuild.flakey.sn-devel-144/2016-12-09-1527/samba.stdout
  
The top commit at the time of the failure was:

commit f5536ce1f6ab4e0764e4e806fb0fca5c43051f86
Author: David Disseldorp <[email protected]>
Date:   Tue Dec 6 13:03:27 2016 +0100

    ctdb: add test script for ctdb_mutex_ceph_rados_helper
    
    This standalone test script performs the following:
    - using ctdb_mutex_ceph_rados_helper, take a lock on the Ceph RADOS
      object a CLUSTER/$POOL/$OBJECT using the Ceph keyring for $USER
      + confirm that lock is obtained, via ctdb_mutex_ceph_rados_helper "0"
        output
    - check RADOS object lock state, using the "rados lock info" command
    - attempt to obtain the lock again, using ctdb_mutex_ceph_rados_helper
      + confirm that the lock is not successfully taken
    - tell the first locker to drop the lock and exit, via SIGTERM
    - once the first locker has exited, attempt to get the lock again
      + confirm that this attempt succeeds
    
    Signed-off-by: David Disseldorp <[email protected]>
    Reviewed-by: Amitay Isaacs <[email protected]>
    
    Autobuild-User(master): Amitay Isaacs <[email protected]>
    Autobuild-Date(master): Fri Dec  9 07:59:33 CET 2016 on sn-devel-144