vendor: Initialize the vendoring with dep tool

[sboeuf]

vendor: Initialize the vendoring with dep tool

This is the first commit related to the vendoring of all dependencies.
This will prevent from any breakage in case a dependency would break
the backward compatibility.

Fixes #32

Signed-off-by: Sebastien Boeuf <sebastien.boeuf@intel.com>

[sboeuf]

Fixes #32
cc @sameo @WeiZhang555 @laijs @gnawux @bergwolf

[WeiZhang555]

I think we can add

[prune]
  go-tests = true

into Gopkg.toml to remove all "_test.go" test files as we don't need them for compilation.

Another option is unused-packages = true, but I'm not sure if it will make lots of differences.

[jodh-intel]

@WeiZhang555 - good call! dep seems to have grown so new features recently:

• https://github.com/golang/dep/blob/master/docs/Gopkg.toml.md#prune

[sboeuf]

@WeiZhang555 sure, I'll update that !

[sboeuf]

@WeiZhang555 @jodh-intel I have updated the PR. However, the _test.go files have not been removed from /vendor. I am wondering if this new feature is stable yet.

[jodh-intel]

Well, the code to prune the test files looks pretty simple:

• https://github.com/golang/dep/blob/master/gps/prune.go#L279..L317

[bergwolf]

fyi, I submitted #48 to enable travis and noticed that there is no vendor in agent. So I took the liberty to add vendor support there as well. I can rebase #48 if this PR got merged first.

[bergwolf]

The prune options in Gopkg.toml are used to control dep ensure behavior and they are not implemented yet. See golang/dep#944

[WeiZhang555]

Maybe we can merge this first, in case it blocks others.

LGTM

[laijs]

It is cherry-picked in #48 , thank you! @sboeuf @bergwolf