Added support for Ruby v2 Specialization (#1101)

* Added support for Ruby v2 Specialization
* Added ruby v2 example with builder code

examples/ruby/parse/Gemfile

@@ -0,0 +1,7 @@
+# frozen_string_literal: true
+
+source "https://rubygems.org"
+
+git_source(:github) {|repo_name| "https://github.com/#{repo_name}" }
+
+gem "nokogiri"

examples/ruby/parse/Gemfile.lock

@@ -0,0 +1,15 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    mini_portile2 (2.4.0)
+    nokogiri (1.10.1)
+      mini_portile2 (~> 2.4.0)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  nokogiri
+
+BUNDLED WITH
+   1.16.1

examples/ruby/parse/parse.rb

@@ -0,0 +1,13 @@
+# frozen_string_literal: true
+
+require 'nokogiri'
+
+def handler(context)
+  context.logger.info("Received request")
+
+  doc = Nokogiri::XML(context.request.body.read)
+  ele = doc.at_xpath('//message')
+  msg = ele.nil? ? 'No Message' : ele.content
+
+   Rack::Response.new([msg, "\n"]).finish
+end