docker-py mem_limit has been moved to host_config in API version 1.19

[Jiri Suchomel]

In recent versions of docker-py (actually since docker-py 1.3.0), mem_limit argument is not expected in create_container_config function, otherwise exception with "mem_limit has been moved to host_config in API version 1.19" is thown

See
https://github.com/docker/docker-py/commit/427e3a60232a5b8ba6c2b91005908321366a0113

However, heat/docker/docker_container.py is still using it. It should be enough if the default value for mem_limit would be None instead of current 0

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/251257

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/251257
Committed: https://git.openstack.org/cgit/openstack/heat/commit/?id=b78f5189d175b954c27b0afb4742517d2a189d0e
Submitter: Jenkins
Branch: master

commit b78f5189d175b954c27b0afb4742517d2a189d0e
Author: Jiří Suchomel <email address hidden>
Date: Mon Nov 30 10:25:09 2015 +0100

    Remove default value for mem_limit to keep up with docker-py

    Change-Id: I04d9be374de7bf00cf89cc6e24aa749cb6686a16
    Closes-Bug: 1521109

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: stable/liberty
Review: https://review.openstack.org/251433

[Thierry Carrez (ttx)]

This issue was fixed in the openstack/heat 6.0.0.0b1 development milestone.

[OpenStack Infra (hudson-openstack)]

Change abandoned by Sergey Kraynev (<email address hidden>) on branch: stable/liberty
Review: https://review.openstack.org/251433
Reason: According decision on weekly team meeting, we need to abandon this patch due to EOL for liberty and broken gate state.