Make Habitat site definition less intrusive

[nickwesselman]

Is your feature request related to a problem? Please describe.
Habitat currently removes the website definition and adds a site definition without a hostName. THis makes it impossible to inherit from website (should Habitat do this itself?), and makes the Habitat site "greedy" and take the request before subsequent sites.

These issues become most apparent when attempting to deploy a JSS site to an instance with Habitat on it.

Describe the solution you'd like

• Remove the removal of website
• Add a hostName attribute to the habitat site definition