Add S3 extension to keystone.conf

Change-Id: I52bae49a8071cc0087a9ddc6b9857245ffdae556
diff --git a/files/keystone.conf b/files/keystone.conf
index b26e70d..76c618a 100644
--- a/files/keystone.conf
+++ b/files/keystone.conf
@@ -57,6 +57,9 @@
 [filter:ec2_extension]
 paste.filter_factory = keystone.contrib.ec2:Ec2Extension.factory
 
+[filter:s3_extension]
+paste.filter_factory = keystone.contrib.s3:S3Extension.factory
+
 [app:public_service]
 paste.app_factory = keystone.service:public_app_factory
 
@@ -64,7 +67,7 @@
 paste.app_factory = keystone.service:admin_app_factory
 
 [pipeline:public_api]
-pipeline = token_auth admin_token_auth json_body debug ec2_extension public_service
+pipeline = token_auth admin_token_auth json_body debug ec2_extension s3_extension public_service
 
 [pipeline:admin_api]
 pipeline = token_auth admin_token_auth json_body debug ec2_extension crud_extension admin_service