Create Architecture Working Group meeting

This replaces the poppy meeting, which has been dormant for 8+ months
now.

Change-Id: I677d30ba99d957c70f5976157f1044d9087c1409

meetings/arch-working-group-meeting.yaml

@@ -0,0 +1,13 @@
+project: Architecture Working Group
+meeting_id: arch_wg
+agenda_url: https://wiki.openstack.org/wiki/Meetings/Arch-WG#Agenda
+schedule:
+  - time:       '1900'
+    day:        Thursday
+    irc:        openstack-meeting-alt
+    frequency:  weekly
+    start_date: 20160908
+chair: Clint Byrum (SpamapS)
+description:  >
+  Discussion and coordination of efforts to document and improve
+  OpenStack's architecture.

meetings/poppy-team-meeting.yaml

@@ -1,12 +0,0 @@
-project:  Poppy Team Meeting
-schedule:
-  - time:       '1900'
-    day:        Thursday
-    irc:        openstack-meeting-alt
-    frequency:  weekly
-    start_date: 20160107
-chair: Amit Gandhi (amitgandhinz)
-meeting_id: poppy
-description:  >
-  Poppy! An OpenStack project designed to make CDN services easier to consume
-  with a generic vendor-neutral API.