Stop testing Ruby 1.9, restore testing against Ruby 2.2
Stop testing Ruby 1.9, restore testing against Ruby 2.2

jbox-web/redmine_git_hosting,stanclai/redmine_git_hosting,stanclai/redmine_git_hosting,jbox-web/redmine_git_hosting,jbox-web/redmine_git_hosting,stanclai/redmine_git_hosting,stanclai/redmine_git_hosting,stanclai/redmine_git_hosting,jbox-web/redmine_git_hosting