Include Ruby 2.2 in travis CI build.
Include Ruby 2.2 in travis CI build.

coupa/resque,resque/resque,resque/resque,stvp/resque,Shopify/resque,CloudVLab/resque,stvp/resque,xiangzhuyuan/resque,coupa/resque,coupa/resque,Shopify/resque,xiangzhuyuan/resque,Shopify/resque,resque/resque,CloudVLab/resque,CloudVLab/resque,xiangzhuyuan/resque,stvp/resque