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-144/2018-03-01-0942/flakey.log

The samba build logs are available here:

   http://git.samba.org/autobuild.flakey.sn-devel-144/2018-03-01-0942/samba.stderr
   http://git.samba.org/autobuild.flakey.sn-devel-144/2018-03-01-0942/samba.stdout
  
The top commit at the time of the failure was:

commit c21d4bc0a13866f47384805e4a8f729b878841e9
Author: Douglas Bagnall <douglas.bagnall at catalyst.net.nz>
Date:   Wed Feb 28 15:59:06 2018 +1300

    py3compat: add strings describing bytes/unicode in both versions
    
    What Python 3 calls "bytes", Python 2 calls "string";
    What Python 3 calls "string", Python 2 calls "unicode".
    
    This can cause confusion in e.g. help strings where the precise type
    matters. These macros can be used to construct accurate messages for
    both versions.
    
    Signed-off-by: Douglas Bagnall <douglas.bagnall at catalyst.net.nz>
    Reviewed-by: Andrew Bartlett <abartlet at samba.org>
    
    Autobuild-User(master): Douglas Bagnall <dbagnall at samba.org>
    Autobuild-Date(master): Thu Mar  1 04:36:15 CET 2018 on sn-devel-144