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

Change-Id: I6fb77ab1ccdf08a18468adbc59474f94d603fc11
diff --git a/deploy-onos-playbook.yml b/deploy-onos-playbook.yml
index dce692b..9b94d07 100644
--- a/deploy-onos-playbook.yml
+++ b/deploy-onos-playbook.yml
@@ -15,6 +15,7 @@
   hosts: head
   roles:
     - onos-cord-install
-    - { role: onos-fabric-install, when: use_fabric }
+    - { role: onos-fabric-install, when: use_fabric | default(False) }
+