ansible: fix kolla_docker issues for EayunStack.
ansible: fix kolla_docker issues for EayunStack.

1. add method to compare container restart policy;
2. container labels should be None if not set to work with lower
   version of python-docker-py (1.10.6);
3. correctly parse container environments.

Signed-off-by: Zhao Chao <abb6a2f7e4fabebf6d227485f53d7acf834f1da2@gmail.com>

huntxu/eayunstack-upgrade,eayunstack/eayunstack-upgrade,huntxu/eayunstack-upgrade,eayunstack/eayunstack-upgrade,huntxu/eayunstack-upgrade,eayunstack/eayunstack-upgrade,eayunstack/eayunstack-upgrade,huntxu/eayunstack-upgrade