Workaround bundle problem on < v1.3

Author: alepore

Gemfile

@@ -10,6 +10,8 @@ if branch == 'master' || branch >= "v2.0"
   gem "rails-controller-testing", group: :test
 end
 
+gem "rails", "4.2.4" if ["v1.1", "v1.2"].include? branch
+
 gem 'pg'
 gem 'sqlite3'
 gem 'mysql2'