fix some inconstancies within the rackspace contrib instructions

Author: davidcollom

contrib/rackspace/README.md

@@ -44,9 +44,9 @@ Provision a Deis Controller on Rackspace
         ...
         ```
 
-1. Create a new image from the `deis-prepare-image` server named `deis-base-image`.
+1. Create a new image from the `deis-prepare-image` server named `deis-node-image`.
     1. In the server list in the Control Panel click the action cog for `deis-prepare-image`
-    1. Select "Create New Image" name that image `deis-base-image`
+    1. Select "Create New Image" name that image `deis-node-image`
     1. (optionally) Distribute the image to other regions
     1. (optionally) Create/update your Deis flavors to use your new images
 

contrib/rackspace/provision-rackspace-controller.sh

@@ -93,4 +93,4 @@ knife rackspace server create \
 set +x
 
 # Need Chef admin permission in order to add and remove nodes and clients
-echo -e "\033[35mPlease ensure that \"deis-controller\" is added to the Chef \"admins\" group.\033[0m"
+echo -e "\033[35mPlease ensure that \"$node_name\" is added to the Chef \"admins\" group.\033[0m"