Update quickstart to point to kubernetes 0.15 and v1beta3 manifest

The dev quickstart document needs to be updated to point to the
Kubernetes 0.15.0 release for cloning. The quickstart document also
needs to be updated to point to the v1beta3 manifest for the redis
pod-create example.

Change-Id: Ibf50e6a93ee0f57c82be4117aaf0aae48c339a85
Closes-Bug: #1464689

doc/source/dev/dev-quickstart.rst

@@ -232,13 +232,14 @@ confused.
 Kubernetes provides a number of examples you can use to check that things
 are working. You may need to clone kubernetes by::
 
-    git clone https://github.com/GoogleCloudPlatform/kubernetes.git
+    wget https://github.com/GoogleCloudPlatform/kubernetes/releases/download/v0.15.0/kubernetes.tar.gz
+    tar -xvzf kubernetes.tar.gz
 
 (No require to install it, we just use the example file)
 Here's how to set up the replicated redis example. First, create
 a pod for the redis-master::
 
-    cd kubernetes/examples/redis/
+    cd kubernetes/examples/redis/v1beta3
     magnum pod-create --manifest ./redis-master.yaml --bay testbay
 
 Now turn up a service to provide a discoverable endpoint for the redis sentinels