Initial commit for adding ansible support

This adds a very basic structure to begin supporting ansible in Kolla.
Ansible can support complete idempotency, but wrapping docker-compose
does not allow idempotency at this time. These playbooks will be
extended to compensate for that in future patches.

Change-Id: I1c9e8d32321e2733f5a9b752edf74b4fe90317ed

ansible/README.md

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+Koalla - Kolla with ansible!
+============================
+
+Koalla extends the Kolla project past [TripleO][] into its own bonified
+deployment system using [Ansible][] and [docker-compose][].
+
+[TripleO]: https://wiki.openstack.org/wiki/TripleO
+[Ansible]: https://docs.ansible.com
+[docker-compose]: http://docs.docker.com/compose
+
+
+Getting Started
+===============
+
+To run the ansible playbooks, you must specify an inventory file which tracks
+all of the available nodes in your environment. With this inventory file
+ansible will log into each node via ssh (configurable) and run tasks. Ansible
+does not require password less logins via ssh, however it is highly recommended
+to setup ssh-keys. More information on the ansible inventory file can be found
+[here][].
+
+[here]: https://docs.ansible.com/intro_inventory.html
+
+
+Deploying
+=========
+
+For AIO deploys, you can run the following commands. These will setup all of
+the containers on your localhost.
+
+```
+$ cd ./kolla/ansible
+$ ansible-playbook -i inventory/all-in-one site.yml
+```
+
+
+Further Reading
+===============
+
+Ansible playbook documentation can be found [here][].
+
+[here]: http://docs.ansible.com/playbooks.html

ansible/inventory/all-in-one

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+[support]
+localhost       ansible_connection=local
+
+[database:children]
+support
+
+[message-broker:children]
+support

ansible/inventory/multinode

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+[support]
+# These hostname must be resolvable from your deployment host
+support01       ansible_ssh_user=sam
+support02       ansible_ssh_user=sam
+support03       ansible_ssh_user=sam
+
+# The above can also be specified as follows:
+#support[01:03]     ansible_ssh_user=sam
+
+[database:children]
+support
+
+[message-broker:children]
+support

ansible/roles/database/tasks/main.yml

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+---
+- name: Bringing up mariadb service(s)
+  command: docker-compose -f /root/kolla/compose/mariadb.yml up -d

ansible/roles/message-broker/tasks/main.yml

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+---
+- name: Bringing up rabbitmq service(s)
+  command: docker-compose -f /root/kolla/compose/rabbitmq.yml up -d

ansible/site.yml

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+---
+- hosts: database
+  roles:
+    - database
+  tags: database
+
+- hosts: message-broker
+  roles:
+    - message-broker
+  tags: message-broker