Add operations-guide.

It is a git filter-branch extration from openstack-manuals.

Addresses bug 1180552.

Change-Id: I0506b76de8cc1df3139781f02d1eef4669f50a7a
Reviewed-on: https://review.openstack.org/29614
Reviewed-by: Jeremy Stanley <fungi@yuggoth.org>
Reviewed-by: Clark Boylan <clark.boylan@gmail.com>
Reviewed-by: Anne Gentle <anne@openstack.org>
Approved: Jeremy Stanley <fungi@yuggoth.org>
Tested-by: Jenkins