Chocolatey - fix the way we use beaker host-generator

Now that we're circling in on a standard way to setup modules we need to do some maintenance on the way we're implementing beaker host-generator in the rakefile. We (I) used to have it hard coded to accept certain configs and so beaker host-generator could be relied on to create a config in a predictable way.

Now we allow a lot of different configurations and beaker host-generator should be used outside of the acceptance and reference calls to create a config in necessary. This would be in conformance to how we use host-generator in IIS and pe-puppet-server-extensions.