Admin group is Member.

This is not the admin group per-se but the group where users can
create/delete containers.

This is will be fixed properly when the swift-keystone2 middleware would
be commited in keystone (should be sometime soon).
diff --git a/files/swift/proxy-server.conf b/files/swift/proxy-server.conf
index fe7e39b..2db6d32 100644
--- a/files/swift/proxy-server.conf
+++ b/files/swift/proxy-server.conf
@@ -16,6 +16,7 @@
 use = egg:swiftkeystone2#keystone2
 keystone_admin_token = %SERVICE_TOKEN%
 keystone_url = http://localhost:35357/v2.0
+keystone_admin_group = Member
 
 [filter:tempauth]
 use = egg:swift#tempauth