Vendor the external cookbooks

Knife-Zero doesn't include Berkshelf support, so vendoring everything in
the repo is convenient again

cookbooks/yum/libraries/matchers.rb

@@ -0,0 +1,9 @@
+if defined?(ChefSpec)
+  def create_yum_globalconfig(resource_name)
+    ChefSpec::Matchers::ResourceMatcher.new(:yum_globalconfig, :create, resource_name)
+  end
+
+  def delete_yum_globalconfig(resource_name)
+    ChefSpec::Matchers::ResourceMatcher.new(:yum_globalconfig, :delete, resource_name)
+  end
+end