Added missing config section for autogeneration

In this changeset, I added the missing entries for the configuration
sample file generation:

- oslo.reports
- oslo.cache
- oslo.concurrency
- oslo.policy
- oslo.service.periodic_task
- oslo.service.service
- oslo.service.wsgi

Change-Id: I826f5cc1185d75f545c96242022a07089cf3042e

etc/watcher/watcher-config-generator.conf

@@ -4,6 +4,13 @@ wrap_width = 79
 
 namespace = watcher
 namespace = keystonemiddleware.auth_token
-namespace = oslo.log
+namespace = oslo.cache
+namespace = oslo.concurrency
 namespace = oslo.db
+namespace = oslo.log
 namespace = oslo.messaging
+namespace = oslo.policy
+namespace = oslo.reports
+namespace = oslo.service.periodic_task
+namespace = oslo.service.service
+namespace = oslo.service.wsgi