Changed the location_path so it contains the full repo URL

This extra info is needed by the berks command when downloading the
cookbooks from Git based on the given API info. Without this extra info
it’s impossible to determine which Github location should be used (when
using multiple organisations and/or Github Enterprise organisations)

This change needs to be merged in correlation with
berkshelf/berkshelf#1045
Merge pull request #88 from svanharmelen/extend_location_path

Changed the location_path so it contains the full repo URL