add vendor entries for github.com/yudai/gojsondiff
add vendor entries for github.com/yudai/gojsondiff

Pull in a jsondiff tool to help make test failures easier to
reconcile when the output is a large blob of json.

enisoc/vitess,tinyspeck/vitess,sougou/vitess,mahak/vitess,rnavarro/vitess,vitessio/vitess,tinyspeck/vitess,mattharden/vitess,HubSpot/vitess,alainjobart/vitess,enisoc/vitess,enisoc/vitess,rnavarro/vitess,tirsen/vitess,HubSpot/vitess,dcadevil/vitess,alainjobart/vitess,davygeek/vitess,enisoc/vitess,mattharden/vitess,alainjobart/vitess,alainjobart/vitess,HubSpot/vitess,mahak/vitess,mahak/vitess,HubSpot/vitess,sougou/vitess,davygeek/vitess,enisoc/vitess,mattharden/vitess,rnavarro/vitess,enisoc/vitess,HubSpot/vitess,mattharden/vitess,enisoc/vitess,dcadevil/vitess,mahak/vitess,tirsen/vitess,tinyspeck/vitess,sougou/vitess,mattharden/vitess,mattharden/vitess,mattharden/vitess,tirsen/vitess,vitessio/vitess,davygeek/vitess,HubSpot/vitess,tirsen/vitess,sougou/vitess,HubSpot/vitess,mahak/vitess,sougou/vitess,vitessio/vitess,mahak/vitess,alainjobart/vitess,mahak/vitess,vitessio/vitess,tinyspeck/vitess,tirsen/vitess,HubSpot/vitess,tirsen/vitess,dcadevil/vitess,davygeek/vitess,mattharden/vitess,vitessio/vitess,rnavarro/vitess,sougou/vitess,dcadevil/vitess,tirsen/vitess,davygeek/vitess,alainjobart/vitess,vitessio/vitess,sougou/vitess,mattharden/vitess,tinyspeck/vitess,rnavarro/vitess,dcadevil/vitess,vitessio/vitess,rnavarro/vitess,alainjobart/vitess,alainjobart/vitess,dcadevil/vitess,davygeek/vitess,vitessio/vitess,davygeek/vitess,tinyspeck/vitess,mattharden/vitess,dcadevil/vitess,tirsen/vitess,mahak/vitess,rnavarro/vitess,rnavarro/vitess,sougou/vitess,tinyspeck/vitess,rnavarro/vitess,tirsen/vitess