Change kolla notifications to #kolla

Previously kolla notificatins occurred to chnnel #tripleo.
Recently the kolla upsteram community has formed its own
channel so it makes sense for these notificatins to go to

Change-Id: I9c7a8f3e51f34d0a15c05baa0be43cc28513b416

accessbot/channels.yaml

@@ -63,6 +63,7 @@ channels:
   - name: git-upstream
     mask: full_mask
   - name: heat
+  - name: kolla
   - name: magnetodb
     mask: full_mask
   - name: murano

gerritbot/channels.yaml

@@ -129,6 +129,16 @@ heat:
     branches:
       - master
 
+kolla:
+    events:
+      - patchset-created
+      - change-merged
+      - x-vrif-minus-2
+    projects:
+      - stackforge/kolla
+    branches:
+      - master
+
 magnetodb:
     events:
       - patchset-created
@@ -1299,7 +1309,6 @@ tripleo:
       - openstack/tripleo-specs
       - openstack/tuskar
       - openstack/tuskar-ui
-      - stackforge/kolla
       - stackforge/prep-source-repos
       - stackforge/puppet-tripleo
       - stackforge/tripleo-ansible