Fix call to private method on old Rubies (#1067)
Fix call to private method on old Rubies (#1067)

Was causing:

    NoMethodError: private method `include' called for
      ActionDispatch::Request:Class

aceunreal/geocoder,Devetzis/geocoder,alexreisner/geocoder,tiramizoo/geocoder,donbobka/geocoder,TrangPham/geocoder,brian-ewell/geocoder,rdlugosz/geocoder,ankane/geocoder