Docker plugin bugs

This is a companion to my article on the Docker plugin for Heat.

While writing that article, I encountered a number of bugs in the Docker plugin and elsewhere. I’ve submitted patches for most of the issues I encountered:

Bugs in the Heat plugin⌗

• https://bugs.launchpad.net/heat/+bug/1364017

  docker plugin fails to delete a container resource in CREATE_FAILED state.

• https://bugs.launchpad.net/heat/+bug/1364041

  docker plugin volumes_from parameter should be a list.

• https://bugs.launchpad.net/heat/+bug/1364039

  docker plugin volumes_from parameter results in an error

• https://bugs.launchpad.net/heat/+bug/1364019

  docker plugin does not actually remove containers on delete

Bugs in docker Python module⌗

• https://github.com/docker/docker-py/pull/310

  allow ports to be specified as port/proto.