fusor - updates to support initial rpm build of fusor_ui

This PR contains the initial changes to support building an RPM for rubygem-fusor_ui. 

Tested this out by performing scratch builds using the koji.katello.org.

There is at least one issue that I am aware of with respect to compilation of assets which currently results in errors when attempting to access the new UI navigation items (e.g. Deployments & New Deployment). Need to investigate how assets should be correctly recompiled from a foreman plugin.

The error looks similar to : 
```
Error compiling asset fusor-demo.js:
LoadError: cannot load such file -- uglifier
  (in /opt/rh/ruby193/root/usr/share/gems/gems/fusor_ui-0.0.1/app/assets/javascripts/fusor-demo.js)
```