Always reset CONF when starting the wsgi app

This ensures that options loaded during any prior run of the
application are dropped before being added again during init_application.

Change-Id: I4267071cdfcb6319ed02e355a9c761fce58e5383

searchlight/cmd/api.py

@@ -74,6 +74,9 @@ def fail(e):
 
 
 def configure_wsgi():
+    # NOTE(hberaud): Call reset to ensure the ConfigOpts object doesn't
+    # already contain registered options if the app is reloaded.
+    CONF.reset()
     config.parse_args()
     config.set_config_defaults()
     logging.setup(CONF, 'searchlight')