spec: byebug columize gem depedency test

Change-Id: I0c1b025e5a56041accdbdbdb7e3f0240f7977f0d
Reviewed-on: https://gerrit.instructure.com/36796
Reviewed-by: Cody Cutrer <cody@instructure.com>
Product-Review: Bryan Madsen <bryan@instructure.com>
QA-Review: Bryan Madsen <bryan@instructure.com>
Tested-by: Shawn Meredith <shawn@instructure.com>

Gemfile.d/development.rb

@@ -16,6 +16,7 @@ group :development do
   # Set this option in your dev environment to disable.
   unless ENV['DISABLE_RUBY_DEBUGGING']
     gem 'byebug', '3.1.2', :platforms => [:ruby_20, :ruby_21]
+      gem 'columnize', '0.8.9', :platforms => [:ruby_20, :ruby_21]
     gem 'debugger', '1.6.6', :platforms => :ruby_19
   end
 end