[accessbot] Default to running a meetbot in all channels

Now that I631e2597bf818c5e4b2f813da14764d2cb55d0ce has merged match
that.

Change-Id: I6a8a1cedd8a83e3e856e8df4aba4d0a584912eb0

accessbot/channels.yaml

@@ -50,6 +50,8 @@ global:
     - yolanda
   status:
     - openstackstatus
+  meetbots:
+    - open_stack
   mask:
     channel_op_mask
 
@@ -155,23 +157,11 @@ channels:
   - name: openstack-loci
   - name: openstack-manila
   - name: openstack-meeting
-    meetbots:
-      - open_stack
   - name: openstack-meeting-3
-    meetbots:
-      - open_stack
   - name: openstack-meeting-4
-    meetbots:
-      - open_stack
   - name: openstack-meeting-5
-    meetbots:
-      - open_stack
   - name: openstack-meeting-alt
-    meetbots:
-      - open_stack
   - name: openstack-meeting-cp
-    meetbots:
-      - open_stack
   - name: openstack-meghdwar
   - name: openstack-meniscus
   - name: openstack-merges