set host key policy for ssh transport to WarningPolicy()
set host key policy for ssh transport to WarningPolicy()

Signed-off-by: Till Riedel <376f9644a51cf1927af6b39f1130f78bb2b055e8@teco.edu>

docker/docker-py,vdemeester/docker-py,docker/docker-py,vdemeester/docker-py