Alphabetize channels in channels.yaml

The comment at the top of channels.yaml claims an alphabetical sort
by channel name, so lets alphabetize it.

Change-Id: Ia710997f37e8fba4a18b26577ecac42dd3137e2a

gerritbot/channels.yaml

@@ -1252,17 +1252,6 @@ openstack-rally:
   branches:
     - master
 
-openstack-rpm-packaging:
-  events:
-    - patchset-created
-    - change-merged
-    - x-vrif-minus-2
-  projects:
-    - openstack/rpm-packaging
-    - openstack/rpm-packaging-tools
-  branches:
-    - master
-
 openstack-relmgr-office:
   events:
     - patchset-created
@@ -1276,6 +1265,17 @@ openstack-relmgr-office:
   branches:
     - master
 
+openstack-rpm-packaging:
+  events:
+    - patchset-created
+    - change-merged
+    - x-vrif-minus-2
+  projects:
+    - openstack/rpm-packaging
+    - openstack/rpm-packaging-tools
+  branches:
+    - master
+
 openstack-sahara:
   events:
     - patchset-created
@@ -1386,6 +1386,16 @@ openstack-terracotta:
   branches:
     - master
 
+openstack-third-party-ci:
+  events:
+    - patchset-created
+    - change-merged
+    - x-vrif-minus-2
+  projects:
+    - stackforge/third-party-ci-tools
+  branches:
+    - master
+
 openstack-trove:
   events:
     - patchset-created
@@ -1602,16 +1612,6 @@ tacker:
   branches:
     - master
 
-openstack-third-party-ci:
-  events:
-    - patchset-created
-    - change-merged
-    - x-vrif-minus-2
-  projects:
-    - stackforge/third-party-ci-tools
-  branches:
-    - master
-
 tricircle:
   events:
     - patchset-created