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
I understand your point to you want to allow ha applications with one parameters.
Unfortunately, a lot of parameters should be changed by the user. For exemple:

conf_router_hostname = 'www.example.com'
conf_ha_dns_prefix = 'ha-'
conf_ha_dns_suffix = ''
conf_zones_min_per_gear_group = 1
conf_default_allow_ha = false