Bump rspec-rails to 3.6 for Rails 5.1 support
Bump rspec-rails to 3.6 for Rails 5.1 support

ayb/spree,imella/spree,vinayvinsol/spree,ayb/spree,vinsol/spree,ayb/spree,vinsol/spree,vinayvinsol/spree,vinayvinsol/spree,ayb/spree,vinayvinsol/spree,imella/spree,vinsol/spree,imella/spree,vinsol/spree