Fix broken iptables command in cinder

Fixes a broken iptables command from
3f34fc4d287fcd2ed7a1be9e116c85a8d336b19e.

This was causing invalid port/service errors.

Also, fixes an issue where the /var/run/cinder
directory doesn't actually exist.

With both of these fixes the cinder element
actually runs for me.

Change-Id: I236a84ac7c73b0295d4734fac62f94b9722bd512
Closes-bug: 1269143