Fix HA mode troubles with Heat

HAProxy configuration doesn't include Heat services CFN and
Cloudwatch API (on port 8000 and 8003) as a result this services
unavailable via public interface.

Change-Id: Iafb5c119445e37e85b2f0d95b38aaee3b2e14b45
Closes-bug: #1353348
Merge "Fix HA mode troubles with Heat"