Kolla-ansible related documents existed on both Kolla and Kolla-Ansible
repositories. A lot of Kolla-ansible related documents were updated in
the Kolla repository. Porting the changes made to these documents in
Kolla repo to Kolla-Ansible repo so that the Kolla-ansible documents can
be removed (Refer to patch https://review.openstack.org/#/c/425749/)
Change-Id: I7c53626ce551189acdb0dcbabe9369b81eed3347
Restructured the documenation to
1. Add reference at the top
2. Updated the title formatting
3. Updated the heading formatting
4. Updated the links formatting
Change-Id: Ie3786e92fee674da1fa39cf07f1bf0a3badd5b92
