[ussuri][goal] Update contributor documentation

This patch updates/adds the contributor documentation to follow
the guidelines of the Ussuri cycle community goal[1].

[1] https://governance.openstack.org/tc/goals/selected/ussuri/project-ptl-and-contrib-docs.html

Story: #2007236
Task: #38517
Change-Id: I2ed8113b4a008475ab9526eed9a004bdfcf5d805

CONTRIBUTING.rst

@@ -0,0 +1,19 @@
+The source repository for this project can be found at:
+
+   https://opendev.org/openstack/cloudkitty
+
+Pull requests submitted through GitHub are not monitored.
+
+To start contributing to OpenStack, follow the steps in the contribution guide
+to set up and use Gerrit:
+
+   https://docs.openstack.org/contributors/code-and-documentation/quick-start.html
+
+Bugs should be filed on Storyboard:
+
+   https://storyboard.openstack.org/#!/project/890
+
+For more specific information about contributing to this repository, see the
+Cloudkitty contributor guide:
+
+   https://docs.openstack.org/cloudkitty/latest/contributor/contributing.html

doc/source/_static/cloudkitty.conf.sample

@@ -402,8 +402,6 @@
 
 # Maximum number of SQL connections to keep open in a pool. Setting a
 # value of 0 indicates no limit. (integer value)
-# Deprecated group/name - [DEFAULT]/sql_max_pool_size
-# Deprecated group/name - [DATABASE]/sql_max_pool_size
 #max_pool_size = 5
 
 # Maximum number of database connection retries during startup. Set to
@@ -1212,10 +1210,17 @@
 # heartbeat. (integer value)
 #heartbeat_rate = 2
 
-# Enable/Disable the RabbitMQ mandatory flag for direct send. The
-# direct send is used as reply, so the MessageUndeliverable exception
-# is raised in case the client queue does not exist. (integer value)
-#direct_mandatory_flag = True
+# DEPRECATED: (DEPRECATED) Enable/Disable the RabbitMQ mandatory flag
+# for direct send. The direct send is used as reply, so the
+# MessageUndeliverable exception is raised in case the client queue
+# does not exist.MessageUndeliverable exception will be used to loop
+# for a timeout to lets a chance to sender to recover.This flag is
+# deprecated and it will not be possible to deactivate this
+# functionality anymore (boolean value)
+# This option is deprecated for removal.
+# Its value may be silently ignored in the future.
+# Reason: Mandatory flag no longer deactivable.
+#direct_mandatory_flag = true
 
 # Enable x-cancel-on-ha-failover flag so that rabbitmq server will
 # cancel and notify consumerswhen queue is down (boolean value)

doc/source/contributor/contributing.rst

@@ -0,0 +1,48 @@
+============================
+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.
+Below will cover the more project specific information you need to get started
+with Cloudkitty.
+
+Communication
+~~~~~~~~~~~~~
+* IRC channel #cloudkitty at FreeNode
+* Mailing list (prefix subjects with ``[cloudkitty]`` for faster responses)
+  http://lists.openstack.org/cgi-bin/mailman/listinfo/openstack-discuss
+
+Contacting the Core Team
+~~~~~~~~~~~~~~~~~~~~~~~~
+Please refer the `Cloudkitty Core Team
+<https://review.opendev.org/admin/groups/4ac765c35f985b3ad9226da07fdcc205c1ce4fe1,members>`_ contacts.
+
+New Feature Planning
+~~~~~~~~~~~~~~~~~~~~
+Cloudkitty features are tracked on `Storyboard <https://storyboard.openstack.org/#!/project/890>`_.
+
+Task Tracking
+~~~~~~~~~~~~~
+We track our tasks in `Storyboard <https://storyboard.openstack.org/#!/project/890>`_.
+If you're looking for some smaller, easier work item to pick up and get started
+on, search for the 'low-hanging-fruit' tag.
+
+Reporting a Bug
+~~~~~~~~~~~~~~~
+You found an issue and want to make sure we are aware of it? You can do so on
+`StoryBoard <https://storyboard.openstack.org/#!/project/890>`_.
+
+Getting Your Patch Merged
+~~~~~~~~~~~~~~~~~~~~~~~~~
+All changes proposed to the Cloudkitty project require one or two +2 votes
+from Cloudkitty core reviewers before one of the core reviewers can approve
+patch by giving ``Workflow +1`` vote.
+
+Project Team Lead Duties
+~~~~~~~~~~~~~~~~~~~~~~~~
+All common PTL duties are enumerated in the `PTL guide
+<https://docs.openstack.org/project-team-guide/ptl.html>`_.

doc/source/index.rst

@@ -35,6 +35,13 @@ Documentation contents
 
           developer/index
 
+   * - **Contributors**
+
+     - .. toctree::
+          :maxdepth: 2
+
+          contributor/contributing
+
    * - **API Reference**
      - .. toctree::
           :maxdepth: 2

doc/source/pdf-index.rst

@@ -33,6 +33,14 @@ Developer
 
    developer/index
 
+Contributors
+------------
+
+.. toctree::
+   :maxdepth: 2
+
+   contributor/contributing
+
 API Reference
 -------------