Add haproxy to the Amazon linux

So we get connections on port 80, and auth
Road test each template

* We need to start and stop a stack with each one
* And connect to Neo4j
* The Amazon linux one is ready out the gate
* The Ubuntu one needs us to wait for it
UDC Source

So we can see if this is working or not later.
Neo4j Enterprise
Always run validation, as it's cheap