Fix the glance_image type example so that it can actually be used.

Change-Id: I10dd74f4ed38f33e344cdd96d0c763fb9b97ac1a

lib/puppet/type/glance_image.rb

@@ -3,12 +3,12 @@ Puppet::Type.newtype(:glance_image) do
     This allows manifests to declare an image to be
     stored in glance.
 
-    glance_image {
+    glance_image { "Ubuntu 12.04 cloudimg amd64":
       ensure           => present,
       name             => "Ubuntu 12.04 cloudimg amd64"
-      is_public        => true,
+      is_public        => yes,
       container_format => ovf,
-      disk_format      => qcow',
+      disk_format      => 'qcow2',
       source           => 'http://uec-images.ubuntu.com/releases/precise/release/ubuntu-12.04-server-cloudimg-amd64-disk1.img'
     }