HA features in broker conf

Hi,

I would like to use puppet with the HA features of OpenShift.
This is the first Pull Request that add customization on the broker configuration files, for HA feature.

Cheers
Are these three required for HA? If so should we set their defaults based on the value of conf_broker_allow_ha_applications?

I'm also wondering if conf_broker_allow_ha_applications should default to false, that's not the default in the config files, but it would give us a convenient parameter to set other defaults from if we wanted to reduce the number of items a user must change at once to yield a config that would work for 80%.