fix failing tests

Includes a monkey patch for Arel that may need to be removed when 4.0.0 final ships

config/initializers/monkey_patch_arel.rb

@@ -0,0 +1,15 @@
+# From https://github.com/rails/arel/issues/149
+# Also fixes https://github.com/rails/rails/issues/9263
+
+module Arel
+  module Nodes
+    class SqlLiteral < String
+      def encode_with(coder)
+        coder['string'] = to_s
+      end
+      def init_with(coder)
+        clear << coder['string']
+      end
+    end
+  end
+end