Downgrade mysql cookbook for now

It doesn't play well with our current dev server setup

cookbooks/smf/libraries/helper.rb

@@ -0,0 +1,9 @@
+unless defined?(SMFManifest::Helper)
+  module SMFManifest
+    # Generic helper that other helpers can inherit from.
+    # Takes the current node object, as well as an optional
+    # resource.
+    class Helper < Struct.new(:node, :resource)
+    end
+  end
+end