Ussuri contributor docs community goal

- Updated CONTRIBUTING.rst per goal guidelines
- Created doc/source/contributor/contributing.rst per goal guidelines

Change-Id: I524ca2f4e6e7d08f77ab904c9e079dd94f24526c

CONTRIBUTING.rst

@@ -1,20 +1,19 @@
-If you would like to contribute to the development of OpenStack,
-you must follow the steps in this page:
+The source repository for this project can be found at:
 
-   https://docs.openstack.org/infra/manual/developers.html
+   https://opendev.org/openstack/sahara-tests
 
-You can find more Sahara-specific info in our How To Participate guide:
+Pull requests submitted through GitHub are not monitored.
 
-   https://docs.openstack.org/sahara/latest/contributor/how-to-participate.html
+To start contributing to OpenStack, follow the steps in the contribution guide
+to set up and use Gerrit:
 
-Once those steps have been completed, changes to OpenStack
-should be submitted for review via the Gerrit tool, following
-the workflow documented at:
+   https://docs.openstack.org/contributors/code-and-documentation/quick-start.html
 
-   https://docs.openstack.org/infra/manual/developers.html#development-workflow
+Bugs should be filed on Storyboard:
 
-Pull requests submitted through GitHub will be ignored.
+   https://storyboard.openstack.org/#!/project/openstack/sahara-tests
 
-Bugs should be filed on Storyboard, not GitHub:
+For more specific information about contributing to this repository, see the
+sahara-tests contributor guide:
 
-   https://storyboard.openstack.org/#!/project/940
+   https://docs.openstack.org/sahara-tests/latest/contributor/contributing.html

doc/source/contributor/contributing.rst

@@ -0,0 +1,14 @@
+============================
+So You Want to Contribute...
+============================
+
+For general information on contributing to OpenStack, please check out the
+`contributor guide <https://docs.openstack.org/contributors/>`_ to get started.
+It covers all the basics that are common to all OpenStack projects: the
+accounts you need, the basics of interacting with our Gerrit review system, how
+we communicate as a community, etc.
+
+sahara-tests is maintained by the OpenStack Sahara project.
+To understand our development process and how you can contribute to it, please
+look at the Sahara project's general contributor's page:
+http://docs.openstack.org/sahara/latest/contributor/contributing.html

doc/source/index.rst

@@ -23,6 +23,13 @@ User guide
 
    tempest-plugin
 
+**Contributor Guide**
+
+.. toctree::
+   :maxdepth: 1
+
+   contributor/contributing
+
 Source
 ------
 
@@ -43,4 +50,3 @@ Indices and tables
 
 * :ref:`genindex`
 * :ref:`search`
-