When docker-py is newer than docker daemon following
APIError may be raised:
client is newer than server (client API version: 1.24, server API version: 1.22)
So it's better to pass api_version='auto' to docker client,
so client will discover suitable version if not specified.
Change-Id: Ib747ed91b315ca762936a6efa6b71a29b2d2ae1e
Signed-off-by: Pavel Glushchak <pglushchak@virtuozzo.com>