Remove all duplication the specs

S3 and Swift now run the same specs. The only difference is the before
block that defines the stubbed HTTP requests and the responses from the
Swift and S3 servers

spec/spec_helper.rb

@@ -6,12 +6,15 @@ Bundler.require
 
 require_relative '../liquor-cabinet'
 require 'minitest/autorun'
+require "minitest/stub_any_instance"
 require 'rack/test'
 require 'purdytest'
 require "redis"
 require "rest_client"
-require "minitest/stub_any_instance"
 require "ostruct"
+require 'webmock/minitest'
+
+WebMock.disable_net_connect!
 
 def app
   LiquorCabinet
@@ -19,17 +22,6 @@ end
 
 app.set :environment, :test
 
-def wait_a_second
-  now = Time.now.to_i
-  while Time.now.to_i == now; end
-end
-
-def write_last_response_to_file(filename = "last_response.html")
-  File.open(filename, "w") do |f|
-    f.write last_response.body
-  end
-end
-
 alias context describe
 
 if app.settings.respond_to? :redis
@@ -43,3 +35,23 @@ if app.settings.respond_to? :redis
     end
   end
 end
+
+MiniTest::Spec.class_eval do
+  def self.shared_examples
+    @shared_examples ||= {}
+  end
+end
+
+module MiniTest::Spec::SharedExamples
+  def shared_examples_for(desc, &block)
+    MiniTest::Spec.shared_examples[desc] = block
+  end
+
+  def it_behaves_like(desc)
+    self.instance_eval(&MiniTest::Spec.shared_examples[desc])
+  end
+end
+
+Object.class_eval { include(MiniTest::Spec::SharedExamples) }
+
+require_relative 'shared_examples'