[CORD-1530]
Make config file directory creation using become an optional step
Cleanup various incongruities in defaults

Change-Id: I6fb77ab1ccdf08a18468adbc59474f94d603fc11
diff --git a/roles/compute-node-config/defaults/main.yml b/roles/compute-node-config/defaults/main.yml
index b8fed3c..abeef30 100644
--- a/roles/compute-node-config/defaults/main.yml
+++ b/roles/compute-node-config/defaults/main.yml
@@ -2,8 +2,8 @@
 # compute-node-config/defaults/main.yml
 
 # default site/deployment placeholder names
-site_name: sitename
-deployment_type: deploymenttype
+site_name: placeholder-sitename
+deployment_type: placeholder-deploymenttype
 
 # location of cord_profile on head node
 head_cord_profile_dir: /opt/cord_profile