Remove unused openssl bits
Depend on crowbar-pacemaker cookbook
Use CrowbarPacemakerHelper.haproxy_servers_for_service
Include the HA recipe after having created the service

This is the current model we're following (it will allow stopping the
service before restarting them with pacemaker, when required).
Merge pull request #1 from vuntz/haproxy

Cleanups required before merging