Migrate from dep to go module

Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>

vendor/golang.org/x/lint/.travis.yml

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+sudo: false
+language: go
+go:
+  - 1.10.x
+  - 1.11.x
+  - master
+
+go_import_path: golang.org/x/lint
+
+install:
+  - go get -t -v ./...
+
+script:
+  - go test -v -race ./...
+
+matrix:
+  allow_failures:
+    - go: master
+  fast_finish: true

vendor/golang.org/x/lint/CONTRIBUTING.md

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+# Contributing to Golint
+
+## Before filing an issue:
+
+### Are you having trouble building golint?
+
+Check you have the latest version of its dependencies. Run
+```
+go get -u golang.org/x/lint/golint
+```
+If you still have problems, consider searching for existing issues before filing a new issue.
+
+## Before sending a pull request:
+
+Have you understood the purpose of golint? Make sure to carefully read `README`.

vendor/golang.org/x/lint/README.md

@@ -0,0 +1,88 @@
+Golint is a linter for Go source code.
+
+[![Build Status](https://travis-ci.org/golang/lint.svg?branch=master)](https://travis-ci.org/golang/lint)
+
+## Installation
+
+Golint requires a
+[supported release of Go](https://golang.org/doc/devel/release.html#policy).
+
+    go get -u golang.org/x/lint/golint
+
+To find out where `golint` was installed you can run `go list -f {{.Target}} golang.org/x/lint/golint`. For `golint` to be used globally add that directory to the `$PATH` environment setting.
+
+## Usage
+
+Invoke `golint` with one or more filenames, directories, or packages named
+by its import path. Golint uses the same
+[import path syntax](https://golang.org/cmd/go/#hdr-Import_path_syntax) as
+the `go` command and therefore
+also supports relative import paths like `./...`. Additionally the `...`
+wildcard can be used as suffix on relative and absolute file paths to recurse
+into them.
+
+The output of this tool is a list of suggestions in Vim quickfix format,
+which is accepted by lots of different editors.
+
+## Purpose
+
+Golint differs from gofmt. Gofmt reformats Go source code, whereas
+golint prints out style mistakes.
+
+Golint differs from govet. Govet is concerned with correctness, whereas
+golint is concerned with coding style. Golint is in use at Google, and it
+seeks to match the accepted style of the open source Go project.
+
+The suggestions made by golint are exactly that: suggestions.
+Golint is not perfect, and has both false positives and false negatives.
+Do not treat its output as a gold standard. We will not be adding pragmas
+or other knobs to suppress specific warnings, so do not expect or require
+code to be completely "lint-free".
+In short, this tool is not, and will never be, trustworthy enough for its
+suggestions to be enforced automatically, for example as part of a build process.
+Golint makes suggestions for many of the mechanically checkable items listed in
+[Effective Go](https://golang.org/doc/effective_go.html) and the
+[CodeReviewComments wiki page](https://golang.org/wiki/CodeReviewComments).
+
+## Scope
+
+Golint is meant to carry out the stylistic conventions put forth in
+[Effective Go](https://golang.org/doc/effective_go.html) and
+[CodeReviewComments](https://golang.org/wiki/CodeReviewComments).
+Changes that are not aligned with those documents will not be considered.
+
+## Contributions
+
+Contributions to this project are welcome provided they are [in scope](#scope),
+though please send mail before starting work on anything major.
+Contributors retain their copyright, so we need you to fill out
+[a short form](https://developers.google.com/open-source/cla/individual)
+before we can accept your contribution.
+
+## Vim
+
+Add this to your ~/.vimrc:
+
+    set rtp+=$GOPATH/src/golang.org/x/lint/misc/vim
+
+If you have multiple entries in your GOPATH, replace `$GOPATH` with the right value.
+
+Running `:Lint` will run golint on the current file and populate the quickfix list.
+
+Optionally, add this to your `~/.vimrc` to automatically run `golint` on `:w`
+
+    autocmd BufWritePost,FileWritePost *.go execute 'Lint' | cwindow
+
+
+## Emacs
+
+Add this to your `.emacs` file:
+
+    (add-to-list 'load-path (concat (getenv "GOPATH")  "/src/golang.org/x/lint/misc/emacs/"))
+    (require 'golint)
+
+If you have multiple entries in your GOPATH, replace `$GOPATH` with the right value.
+
+Running M-x golint will run golint on the current file.
+
+For more usage, see [Compilation-Mode](http://www.gnu.org/software/emacs/manual/html_node/emacs/Compilation-Mode.html).

vendor/golang.org/x/lint/go.mod

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+module golang.org/x/lint
+
+go 1.11
+
+require golang.org/x/tools v0.0.0-20191125144606-a911d9008d1f

vendor/golang.org/x/lint/go.sum

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+golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
+golang.org/x/net v0.0.0-20190620200207-3b0461eec859/go.mod h1:z5CRVTTTmAJ677TzLLGU+0bjPO0LkuOLi4/5GtJWs/s=
+golang.org/x/sync v0.0.0-20190423024810-112230192c58/go.mod h1:RxMgew5VJxzue5/jJTE5uejpjVlOe/izrB70Jof72aM=
+golang.org/x/sys v0.0.0-20190215142949-d0b11bdaac8a/go.mod h1:STP8DvDyc/dI5b8T5hshtkjS+E42TnysNCUPdjciGhY=
+golang.org/x/text v0.3.0/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
+golang.org/x/tools v0.0.0-20191125144606-a911d9008d1f h1:kDxGY2VmgABOe55qheT/TFqUMtcTHnomIPS1iv3G4Ms=
+golang.org/x/tools v0.0.0-20191125144606-a911d9008d1f/go.mod h1:b+2E5dAYhXwXZwtnZ6UAqBI28+e2cm9otk0dWdXHAEo=
+golang.org/x/xerrors v0.0.0-20190717185122-a985d3407aa7/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=