Add tests for vars we're going to use.

playbooks/roles/legacy_ora/tasks/main.yml

@@ -4,6 +4,17 @@
 # This role requires that ora_app_dir and ora_user both be defined.
 # There is no default for them.
 #
+- fail: msg="ora_app_dir not defined. eg. /edx/app/ora, /opt/wwc"
+  when: ora_app_dir is not defined
+
+- fail: msg="ora_user not defined. eg. ora, www-data"
+  when: ora_user is not defined
+
+- fail: msg="COMMON_ENV_TYPE not defined. eg. stage, prod"
+  when: COMMON_ENV_TYPE is not defined
+
+- fail: msg="secure_dir not defined. This is a path to the secure ora config file."
+  when: secure_dir is not defined
 
 - name: legacy_ora | create ora application config
   file: