Add missing osprofiler options

osprofiler was integrated to Neutron a while ago[1] but the options
for this library have not been added to neutron.conf properly.

This ensures the options are rendered by oslo-config-generator.

[1] 9a43f58f4d

Change-Id: Ice1b3f701ac244e17d855484263199f8a0b8310b

etc/oslo-config-generator/neutron.conf

@@ -27,3 +27,4 @@ namespace = oslo.service.service
 namespace = oslo.service.sslutils
 namespace = oslo.service.wsgi
 namespace = keystonemiddleware.auth_token
+namespace = osprofiler