Add gerritbot trigger for microstack

Change-Id: I4eecd74c833d7d3d1a2ae4312cdf0496d2e6586f

accessbot/channels.yaml

@@ -260,6 +260,7 @@ channels:
   - name: openstack-searchlight
   - name: openstack-self-healing
   - name: openstack-service-broker
+  - name: openstack-snaps
   - name: openstack-solar
   - name: openstack-spaceport
     mask: full_mask

gerritbot/channels.yaml

@@ -1862,6 +1862,15 @@ openstack-service-broker:
   branches:
     - master
 
+openstack-snaps:
+  events:
+    - patchset-created
+    - change-merged
+  projects:
+    - x/microstack
+  branches:
+    - master
+
 openstack-solar:
   events:
     - patchset-created