This PR switches the Nomad repository from using govendor to Go modules
for managing dependencies. Aspects of the Nomad workflow remain pretty
much the same. The usual Makefile targets should continue to work as
they always did. The API submodule simply defers to the parent Nomad
version on the repository, keeping the semantics of API versioning that
currently exists.
* vendor: bump libcontainer and docker to remove Sirupsen imports
* vendor: fix bad vendoring of archive package
* vendor: fix api changes to cgroups in executor
* vendor: fix docker api changes
* vendor: update github.com/Azure/go-ansiterm to use non capitalized logrus import
This is a weird one because `make bootstrap` does a `go get vault` so CI
never fails due to missing Vault dependencies. However developer
machines will have whatever version of vault they grabbed last time they
bootstrapped a new dev environment.
This can lead to surprising build issues and different devs testing
slightly different code.
So let's vendor all test deps to try to keep the Nomad repo
self-contained.
