Replace outdated core team list by Gerrit links

Copied from the same file in Kolla documentation.

Change-Id: I4a2beae7613c18cd19e16d4d04f42685a94b4f4f
Signed-off-by: Bartosz Bezak <[email protected]>
(cherry picked from commit 3d4505a)

Author: priteau

doc/source/contributor/contributing.rst

@@ -46,48 +46,12 @@ Whiteboard (etherpad)
 Contacting the Core Team
 ~~~~~~~~~~~~~~~~~~~~~~~~
 
-The list in alphabetical order (on first name):
-
-+-----------------------+---------------+------------------------------------+
-| Name                  | IRC nick      | Email address                      |
-+=======================+===============+====================================+
-| `Chason Chan`_        | chason        | [email protected]            |
-+-----------------------+---------------+------------------------------------+
-| `Christian Berendt`_  | berendt       | [email protected]     |
-+-----------------------+---------------+------------------------------------+
-| `Dincer Celik`_       | osmanlicilegi | [email protected]              |
-+-----------------------+---------------+------------------------------------+
-| `Eduardo Gonzalez`_   | egonzalez     | [email protected]                 |
-+-----------------------+---------------+------------------------------------+
-| `Jeffrey Zhang`_      | Jeffrey4l     | [email protected]          |
-+-----------------------+---------------+------------------------------------+
-| `Marcin Juszkiewicz`_ | hrw           | [email protected]      |
-+-----------------------+---------------+------------------------------------+
-| `Mark Goddard`_       | mgoddard      | [email protected]                  |
-+-----------------------+---------------+------------------------------------+
-| `Michał Nasiadka`_    | mnasiadka     | [email protected]                |
-+-----------------------+---------------+------------------------------------+
-| `Radosław Piliszek`_  | yoctozepto    | [email protected]        |
-+-----------------------+---------------+------------------------------------+
-| `Surya Prakash`_      | spsurya       | [email protected]       |
-+-----------------------+---------------+------------------------------------+
-| `Cao Yuan`_           | caoyuan       | [email protected]               |
-+-----------------------+---------------+------------------------------------+
-
-.. _Chason Chan: https://launchpad.net/~chen-xing
-.. _Christian Berendt: https://launchpad.net/~berendt
-.. _Dincer Celik: https://launchpad.net/~osmanlicilegi
-.. _Eduardo Gonzalez: https://launchpad.net/~egonzalez90
-.. _Jeffrey Zhang: https://launchpad.net/~jeffrey4l
-.. _Marcin Juszkiewicz: https://launchpad.net/~hrw
-.. _Mark Goddard: https://launchpad.net/~mgoddard
-.. _Michał Nasiadka: https://launchpad.net/~mnasiadka
-.. _Radosław Piliszek: https://launchpad.net/~yoctozepto
-.. _Surya Prakash: https://launchpad.net/~confisurya
-.. _Cao Yuan: https://launchpad.net/~caoi-yuan
-
-The current effective list is also available from Gerrit:
-https://review.opendev.org/#/admin/groups/1637,members
+In general it is suggested to use the above mentioned public communication
+channels, but if you find that you need to contact someone from the Core team
+directly, you can find the lists in Gerrit:
+
+- kolla-core https://review.opendev.org/admin/groups/28d5dccfccc125b3963f76ab67e256501565d52b,members
+- kayobe-core https://review.opendev.org/admin/groups/361e28280e3a06be2997a5aa47a8a11d3a8fb9b9,members
 
 New Feature Planning
 ~~~~~~~~~~~~~~~~~~~~