Adopting the DPL governance model for oslo

The goal of this patch is to move oslo under the DPL governance model.

Few weeks ago Ben officially announced to stepping down from its role of
oslo PTL [1], at this point nobody volunteered to become the new PTL of oslo
during Wallaby. Accordingly to our latest discussions [2] and our latest
meeting [3] we decided to adopt the DPL governance model.

Indeed after few discussions [2][3] we reached a consensus to experiment
the DPL model [4] on oslo. Accordingly to this governance model we
assigned the required roles [5][6].

During the lastest oslo meeting we decided to
create groups of paired liaison [6], especially for release liaison role and
the TaCT SIG liaison role [5][6].

I would like to personally thank Ben for assuming the PTL role during
the previous cycles and for the works he have done at this position and
for oslo in general, especially during the previous cycle where he was
volunteer even if oslo wasn't its main topic at work.

[1] http://lists.openstack.org/pipermail/openstack-discuss/2020-September/017491.html
[2] http://lists.openstack.org/pipermail/openstack-discuss/2020-September/017692.html
[3] http://eavesdrop.openstack.org/meetings/oslo/2020/oslo.2020-10-12-15.00.log.txt
[4] https://governance.openstack.org/tc/resolutions/20200803-distributed-project-leadership.html
[5] https://governance.openstack.org/tc/resolutions/20200803-distributed-project-leadership.html#required-roles
[6] https://wiki.openstack.org/wiki/Oslo#Project_Leadership_Liaisons

Change-Id: I2d1bee56fce9385c5158d083dc838bdae0716e37

reference/projects.yaml

@@ -2108,12 +2108,7 @@ OpenStackSDK:
   liaisons:
       tc_members: [diablo_rojo, cloudnull]
 oslo:
-  ptl:
-    name: APPOINTMENT NEEDED
-    irc: No nick supplied
-    email: example@example.org
-  appointed:
-    - victoria
+  leadership_type: distributed
   irc-channel: openstack-oslo
   service: Common libraries
   mission: >
@@ -2324,7 +2319,28 @@ oslo:
         - openstack/whereto
 
   liaisons:
-      tc_members: [ricolin, belmoreira]
+    tc_members:
+      - ricolin
+      - belmoreira
+    release:
+      - name: Hervé Beraud
+        irc: hberaud
+        email: hberaud@redhat.com
+      - name: Daniel Bengtsson
+        irc: damani
+        email: dbengt@redhat.com
+    tact-sig:
+      - name: Moisés Guimarães
+        irc: moguimar
+        email: moguimar@redhat.com
+      - name: Sébastien Boyron
+        irc: sboyron
+        email: sboyron@redhat.com
+    security:
+      - name: Ben Nemec
+        irc: bnemec
+        email: openstack@nemebean.com
+
 placement:
   ptl:
     name: APPOINTMENT NEEDED