Consolidate meeting channels

There is no need for 4 meeting channels, especially now that
we allow meetings to happen in team channels.

Let's remove #openstack-meeting-4 by moving the few meetings
still happening there to other available meeting channels.

Once this merges, we can retire #openstack-meeting-4.

Change-Id: I96890de13083c09bdd677bf44b6eee535e6fde20

meetings/cinder-team-meeting.yaml

@@ -4,7 +4,7 @@ agenda_url: https://wiki.openstack.org/wiki/CinderMeetings
 schedule:
   - time:       '1400'
     day:        Wednesday
-    irc:        openstack-meeting-4
+    irc:        openstack-meeting-alt
     frequency:  weekly
     start_date: 20191204
 chair:  Brian Rosmaita (rosmaita)

meetings/glance-team-meeting.yaml

@@ -4,7 +4,7 @@ agenda_url: https://etherpad.openstack.org/p/glance-team-meeting-agenda
 schedule:
   - time:       '1400'
     day:        Thursday
-    irc:        openstack-meeting-4
+    irc:        openstack-meeting
     frequency:  weekly
     start_date: 20160107
 chair: Erno Kuvaja (jokke_)

meetings/openstack-charms.yaml

@@ -4,12 +4,12 @@ agenda_url: https://etherpad.openstack.org/p/openstack-charms-weekly-meeting
 schedule:
   - time:       '1700'
     day:        Monday
-    irc:        openstack-meeting-4
+    irc:        openstack-meeting
     frequency:  biweekly-even
     start_date: 20160711
   - time:       '1000'
     day:        Monday
-    irc:        openstack-meeting-4
+    irc:        openstack-meeting
     frequency:  biweekly-odd
     start_date: 20161205
 chair: Liam young (gnuoy), Alex Kavanagh (tinwood), David Ames (thedac), James Page (jamespage), Carlos Gonzales (cargonza)

meetings/openstack-helm-team-meeting.yaml

@@ -4,7 +4,7 @@ agenda_url: https://etherpad.openstack.org/p/openstack-helm-meeting-agenda
 schedule:
   - time:       '1500'
     day:        Tuesday
-    irc:        openstack-meeting-4
+    irc:        openstack-meeting-alt
     frequency:  weekly
     start_date: 20160502
 chair: Matt McEuen (mattmceuen)

meetings/vitrage-team-meeting.yaml

@@ -4,7 +4,7 @@ agenda_url: https://wiki.openstack.org/wiki/Meetings/Vitrage
 schedule:
   - time:       '0800'
     day:        Wednesday
-    irc:        openstack-meeting-4
+    irc:        openstack-meeting
     frequency:  weekly
     start_date: 20160106
 chair:  Ifat Afek (ifat_afek)