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:

   https://git.samba.org/autobuild.flakey.sn-devel-144/2019-04-24-1232/flakey.log

The failure seems to be in the "samba-ctdb" suite, whose build logs are available here:

   https://git.samba.org/autobuild.flakey.sn-devel-144/2019-04-24-1232/samba-ctdb.stderr
   https://git.samba.org/autobuild.flakey.sn-devel-144/2019-04-24-1232/samba-ctdb.stdout
  
The top commit at the time of the failure was:

commit 92f30f91e44dba7e85d56279bbbe3662d0b5faeb
Author: Lutz Justen <ljusten at google.com>
Date:   Mon Apr 22 10:22:16 2019 -0700

    waf: build: Respect --disable-python for third_party modules
    
    Skips installation of samba/third_party stuff into the python directory if
    --disable-python is set.
    
    Added test after install that confirms no python modules installed.
    
    BUG: https://bugzilla.samba.org/show_bug.cgi?id=13905
    
    Signed-off-by: Lutz Justen <ljusten at google.com>
    Reviewed-by: Jeremy Allison <jra at samba.org>
    Reviewed-by: Andrew Bartlett <abartlet at samba.org>
    
    Autobuild-User(master): Andrew Bartlett <abartlet at samba.org>
    Autobuild-Date(master): Wed Apr 24 07:32:31 UTC 2019 on sn-devel-184

and the last 50 lines of the stdout log were:

symlink: samba/tests/samba_tool/dsacl.py -> python/samba/tests/samba_tool/dsacl.py
symlink: samba/tests/samba_tool/forest.py -> python/samba/tests/samba_tool/forest.py
symlink: samba/tests/samba_tool/fsmo.py -> python/samba/tests/samba_tool/fsmo.py
symlink: samba/tests/samba_tool/gpo.py -> python/samba/tests/samba_tool/gpo.py
symlink: samba/tests/samba_tool/group.py -> python/samba/tests/samba_tool/group.py
symlink: samba/tests/samba_tool/help.py -> python/samba/tests/samba_tool/help.py
symlink: samba/tests/samba_tool/join.py -> python/samba/tests/samba_tool/join.py
symlink: samba/tests/samba_tool/ntacl.py -> python/samba/tests/samba_tool/ntacl.py
symlink: samba/tests/samba_tool/ou.py -> python/samba/tests/samba_tool/ou.py
symlink: samba/tests/samba_tool/passwordsettings.py -> python/samba/tests/samba_tool/passwordsettings.py
symlink: samba/tests/samba_tool/processes.py -> python/samba/tests/samba_tool/processes.py
symlink: samba/tests/samba_tool/provision_password_check.py -> python/samba/tests/samba_tool/provision_password_check.py
symlink: samba/tests/samba_tool/rodc.py -> python/samba/tests/samba_tool/rodc.py
symlink: samba/tests/samba_tool/schema.py -> python/samba/tests/samba_tool/schema.py
symlink: samba/tests/samba_tool/sites.py -> python/samba/tests/samba_tool/sites.py
symlink: samba/tests/samba_tool/timecmd.py -> python/samba/tests/samba_tool/timecmd.py
symlink: samba/tests/samba_tool/user.py -> python/samba/tests/samba_tool/user.py
symlink: samba/tests/samba_tool/user_check_password_script.py -> python/samba/tests/samba_tool/user_check_password_script.py
symlink: samba/tests/samba_tool/user_virtualCryptSHA.py -> python/samba/tests/samba_tool/user_virtualCryptSHA.py
symlink: samba/tests/samba_tool/user_wdigest.py -> python/samba/tests/samba_tool/user_wdigest.py
symlink: samba/tests/samba_tool/visualize.py -> python/samba/tests/samba_tool/visualize.py
symlink: samba/tests/samba_tool/visualize_drs.py -> python/samba/tests/samba_tool/visualize_drs.py
symlink: samba/tests/samdb.py -> python/samba/tests/samdb.py
symlink: samba/tests/samdb_api.py -> python/samba/tests/samdb_api.py
symlink: samba/tests/security.py -> python/samba/tests/security.py
symlink: samba/tests/segfault.py -> python/samba/tests/segfault.py
symlink: samba/tests/smb.py -> python/samba/tests/smb.py
symlink: samba/tests/smbd_base.py -> python/samba/tests/smbd_base.py
symlink: samba/tests/source.py -> python/samba/tests/source.py
symlink: samba/tests/strings.py -> python/samba/tests/strings.py
symlink: samba/tests/subunitrun.py -> python/samba/tests/subunitrun.py
symlink: samba/tests/tdb_util.py -> python/samba/tests/tdb_util.py
symlink: samba/tests/upgrade.py -> python/samba/tests/upgrade.py
symlink: samba/tests/upgradeprovision.py -> python/samba/tests/upgradeprovision.py
symlink: samba/tests/upgradeprovisionneeddc.py -> python/samba/tests/upgradeprovisionneeddc.py
symlink: samba/tests/xattr.py -> python/samba/tests/xattr.py
symlink: samba/upgrade.py -> python/samba/upgrade.py
symlink: samba/upgradehelpers.py -> python/samba/upgradehelpers.py
symlink: samba/uptodateness.py -> python/samba/uptodateness.py
symlink: samba/xattr.py -> python/samba/xattr.py
symlink: rpc/dcerpc.py -> python/samba/dcerpc/__init__.py
	Selected embedded Heimdal build
symlink: samba-tool -> ./samba-tool
symlink: samba_dnsupdate -> ./samba_dnsupdate
symlink: samba_spnupdate -> ./samba_spnupdate
symlink: samba_kcc -> ./samba_kcc
symlink: samba_upgradeprovision -> ./samba_upgradeprovision
symlink: samba_upgradedns -> ./samba_upgradedns
symlink: gen_output.py -> ./gen_output.py
symlink: samba-gpupdate -> ./samba-gpupdate