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-144/2017-07-16-0038/flakey.log

The samba build logs are available here:

   http://git.samba.org/autobuild.flakey.sn-devel-144/2017-07-16-0038/samba.stderr
   http://git.samba.org/autobuild.flakey.sn-devel-144/2017-07-16-0038/samba.stdout
  
The top commit at the time of the failure was:

commit 4cced4da4ca97f0c6db227e6b2c7e03c2e5c1f28
Author: Andreas Schneider <asn at samba.org>
Date:   Fri Jul 7 14:08:49 2017 +0200

    s3:client: The smbspool krb5 wrapper needs negotiate for authentication
    
    If you create a new printer it doesn't have AuthInfoRequired set and so
    cups calls the backend with:
    
      AUTH_INFO_REQUIRED=none
    
    In this case we need to return:
    
      ATTR: auth-info-required=negotiate
    
    and return an error that we require authentication.
    
    BUG: https://bugzilla.samba.org/show_bug.cgi?id=12886
    
    Signed-off-by: Andreas Schneider <asn at samba.org>
    Reviewed-by: Jeremy Allison <jra at samba.org>
    
    Autobuild-User(master): Jeremy Allison <jra at samba.org>
    Autobuild-Date(master): Sat Jul 15 06:43:47 CEST 2017 on sn-devel-144