doc: Document teams in horizon

Several teams are defined in the horizon project both in
gerrit and launchpad. It would be nice to document them.

Change-Id: Ic88912f6216bcef020a0839380f6528705a0a1a7

doc/source/contributor/policies/horizon-groups.rst

@@ -0,0 +1,69 @@
+=============
+Horizon Teams
+=============
+
+Horizon project defines several teams to maintain the project.
+
+Gerrit
+------
+
+Core Reviewer Team
+~~~~~~~~~~~~~~~~~~
+
+The core reviewer team is responsible for the horizon development
+in the master branch from various perspective.
+See :doc:`core-reviewers` for more detail.
+
+Stable Maintenance Team
+~~~~~~~~~~~~~~~~~~~~~~~
+
+Members of this gerrit group are responsible for maintaining
+stable branches. The members are expected to understand
+`the stable branch policy <https://docs.openstack.org/project-team-guide/stable-branches.html>`__.
+Most members overlaps with the core reviewer team but being a core reviewer is
+not a requirement for being a member of the stable maintenance team.
+Folks who would like to be a member of this team is recommended to express how
+they understand the stable branch policy in reviews.
+
+The member list is found at
+https://review.opendev.org/#/admin/groups/537,members.
+
+Launchpad
+---------
+
+Bug Supervisor Team
+~~~~~~~~~~~~~~~~~~~
+
+Members of this launchpad group are responsible for bug management.
+They have privileges to set status, priority and milestone of bugs.
+Most members overlaps with the core reviewer team
+but it is not a requirement for being a member of this team.
+
+The member list is found at https://launchpad.net/~horizon-bugs.
+
+Horizon Drivers Team
+~~~~~~~~~~~~~~~~~~~~
+
+Members of this launchpad group can do all things in the horizon launchpad
+such as defining series and milestones. This group is included to the bug
+supervisor team.
+
+The member list is found at https://launchpad.net/~horizon-drivers.
+
+Security Contact Team
+~~~~~~~~~~~~~~~~~~~~~
+
+Members of this launchpad group are responsible for security issues.
+Members are expected to be familiar with
+`Vulnerability Management Process
+<https://security.openstack.org/vmt-process.html>`__ in OpenStack.
+Private security issues are handled differently from usual public reports.
+All steps including patch development and review are done in a launchpad
+bug report.
+
+The member list is found at https://launchpad.net/~horizon-coresec.
+
+Note that the access permission to private information of this team
+is configured at https://launchpad.net/horizon/+sharing. (You can find
+"Sharing" menu at the top-right corder of `the launchpad top page
+<https://launchpad.net/horizon>`__.)

doc/source/contributor/policies/index.rst

@@ -8,5 +8,5 @@ This page collects basic policies on horizon development.
    :maxdepth: 1
 
    supported-software
+   horizon-groups
    core-reviewers
-