imported single-controller role from github.com/rcbops/chef-cookbooks and removed missing components

roles/single-controller.rb

@@ -0,0 +1,17 @@
+name "single-controller"
+description "Nova Controller (non-HA)"
+run_list(
+  "role[base]",
+  "role[mysql-master]"
+  # "role[rabbitmq-server]",
+  # "role[keystone]",
+  # "role[glance-registry]",
+  # "role[glance-api]",
+  # "role[nova-setup]",
+  # "role[nova-scheduler]",
+  # "role[nova-api-ec2]",
+  # "role[nova-api-os-compute]",
+  # "role[nova-volume]",
+  # "role[nova-vncproxy]",
+  # "role[horizon-server]"
+)