Adds logical-insight Gem for development and moves

the logical insight code to an initializer so that
it can be turned on and off via config file.

Add logical_insight: true to the development section
of katello.yml and restart server to enable.

src/Gemfile

@@ -83,4 +83,5 @@ end
 group :development do
   # profiler
   gem 'newrelic_rpm'
+  gem 'logical-insight'
 end

src/config/initializers/logical_insight.rb

@@ -0,0 +1,5 @@
+require "logical-insight"
+
+if AppConfig.logical_insight
+  Rails.application.config.middleware.use "Insight::App", :secret_key => false, :ip_masks => false
+end