[doc] Write documentation about Noop tests framework

[Dmitry Ilyin]

Noop tests should be documented:
- How to use,
- How to write,
- How to setup CI gate

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/253553

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/253553
Committed: https://git.openstack.org/cgit/openstack/fuel-library/commit/?id=06e887312bbb96a0e5602f9a8013b0e69f892661
Submitter: Jenkins
Branch: master

commit 06e887312bbb96a0e5602f9a8013b0e69f892661
Author: Bogdan Dobrelya <email address hidden>
Date: Fri Dec 4 14:14:41 2015 +0100

    Add sphinx doc build with tox

    * Add basic doc build system with sphinx and tox
    * Update README.md for how-to build docs
    * Update .gitignore to exclude docs builds
    * Add index and move README for Noop tests framework
    * TODO split and add more details for how-to noop tests
      setup/use/create

    Inspired by https://github.com/openstack/openstack-manuals

    Partial-bug: #1483288

    Change-Id: I982e0baaff5de95c7d0c4b3f098754a80676f0d0
    Signed-off-by: Bogdan Dobrelya <email address hidden>

[Dmitry Pyzhov (dpyzhov)]

This is a documentation bug so it doesn't need to be backported.

[Dmitry Ilyin (idv1985)]

The new framework does have the documentation: https://github.com/openstack/fuel-noop-fixtures

[Timur Nurlygayanov (tnurlygayanov)]

Ok documentation exists, marked as Fix Released.