replace dep with go modules (#16017)

- guide shamelessly stolen from prometheus/prometheus
- updates local interface of oauth exchange
- updates local impl of hclogger
- bump jaeger client version

closes #16088

vendor/github.com/go-macaron/binding/.gitignore

@@ -0,0 +1 @@
+.idea

vendor/github.com/go-macaron/binding/README.md

@@ -0,0 +1,20 @@
+# binding [![Build Status](https://travis-ci.org/go-macaron/binding.svg?branch=master)](https://travis-ci.org/go-macaron/binding) [![Sourcegraph](https://sourcegraph.com/github.com/go-macaron/binding/-/badge.svg)](https://sourcegraph.com/github.com/go-macaron/binding?badge)
+
+Middleware binding provides request data binding and validation for [Macaron](https://github.com/go-macaron/macaron).
+
+### Installation
+
+	go get github.com/go-macaron/binding
+	
+## Getting Help
+
+- [API Reference](https://gowalker.org/github.com/go-macaron/binding)
+- [Documentation](http://go-macaron.com/docs/middlewares/binding)
+
+## Credits
+
+This package is a modified version of [martini-contrib/binding](https://github.com/martini-contrib/binding).
+
+## License
+
+This project is under the Apache License, Version 2.0. See the [LICENSE](LICENSE) file for the full license text.