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-144/2016-12-25-0826/flakey.log

The samba build logs are available here:

   http://git.samba.org/autobuild.flakey.sn-devel-144/2016-12-25-0826/samba.stderr
   http://git.samba.org/autobuild.flakey.sn-devel-144/2016-12-25-0826/samba.stdout
  
The top commit at the time of the failure was:

commit 1e52bb9c34a77c8c79f0bfc81317aded183ada59
Author: Stefan Metzmacher <[email protected]>
Date:   Fri Dec 23 07:22:27 2016 +0100

    krb5_wrap: fix smb_krb5_cc_copy_creds() for MIT krb5
    
    krb5_cc_copy_creds() expects an already initialized output cache.
    
    Signed-off-by: Stefan Metzmacher <[email protected]>
    Reviewed-by: Andreas Schneider <[email protected]>
    
    Autobuild-User(master): Stefan Metzmacher <[email protected]>
    Autobuild-Date(master): Sat Dec 24 21:04:23 CET 2016 on sn-devel-144