New example: Distributed task queue

Adds an example of using Kubernetes to build a distributed task queue
using Celery along with a RabbitMQ broker and Flower frontend.

Resolves: #1788

examples/celery-rabbitmq/rabbitmq-controller.json

@@ -0,0 +1,31 @@
+{
+  "id": "rabbitmq-controller",
+  "kind": "ReplicationController",
+  "apiVersion": "v1beta1",
+  "desiredState": {
+    "replicas": 1,
+    "replicaSelector": {"name": "rabbitmq"},
+    "podTemplate": {
+      "desiredState": {
+        "manifest": {
+          "version": "v1beta1",
+          "id": "rabbitmq",
+          "containers": [{
+            "name": "rabbitmq",
+            "image": "dockerfile/rabbitmq",
+            "cpu": 100,
+            "ports": [{"containerPort": 5672, "hostPort": 5672}]
+          }]
+        }
+      },
+      "labels": {
+        "name": "rabbitmq",
+        "app": "taskQueue"
+      }
+    }
+  },
+  "labels": {
+    "name": "rabbitmq"
+  }
+}
+