add ostruct for head builds, since it is no longer available by default

Author: geemus

Gemfile

@@ -7,6 +7,7 @@ gem "fog-core", :github => "fog/fog-core"
 gem "fog-json", :github => "fog/fog-json"
 
 group :test, :default do
+  gem 'ostruct'
   gem 'pry-nav'
   gem 'mime-types', '~> 3.1'
 end