Fix comments

playbooks/continuous_delivery/run_migrations.yml

@@ -7,16 +7,19 @@
 #
 # Required variables for this playbook:
 #
-#   - application_path                - the path where the Django application with potential migrations is installed
+#   - APPLICATION_PATH                - the top-level path of the Django application; the application lives underneath
+#                                       this directory in a directory with the same name as APPLICATION_NAME.
 #                                       NOTE: It is assumed that edx-django-release-util is one of its INSTALLED_APPS.
-#   - applicaiton_name                - The name of the application that we are migrating.
-#   - application_user                - user which is meant to run the application
+#   - APPLICATION_NAME                - The name of the application that we are migrating.
+#   - APPLICATION_USER                - user which is meant to run the application
+#   - ARTIFACT_PATH                   - the path where the migration artifacts should be copied after completion
+#   - HIPCHAT_TOKEN                   - API token to send messages to hipchat
+#   - HIPCHAT_ROOM                    - ID or name of the room to send the notification
+#   - HIPCHAT_URL                     - URL of the hipchat API  (defaults to v1 of the api)
+#
+# Other variables:
 #   - unapplied_migrations_output     - the filename where the unapplied migration YAML output is stored
 #   - migration_output                - the filename where the migration output is saved
-#   - artifact_path                   - the path where the migration artifacts should be copied after completion
-#   - hipchat_token                   - API token to send messages to hipchat
-#   - hipchat_room                    - ID or name of the room to send the notification
-#   - hipchat_url                     - URL of the hipchat API  (defaults to v1 of the api)
 #
 # Example command line to run this playbook:
 #    ansible-playbook -vvvv -i "localhost," -c local \