Bumps the vendoring of github.com/docker/swarmkit to the above commit,
which is the current master at commit time.
Most notably, this includes a change making the ingress network respect
the default address pool. Because of this change, a change to network
integration tests was needed.
Signed-off-by: Drew Erny <drew.erny@docker.com>
Update swarmkit to 037b491.
As swarmkit switched to a newer gRPC version, this also involves
updating Docker's vendored gRPC, which in turn requires updating
containerd to a new version that has protobufs generated against this
gRPC version.
Signed-off-by: Aaron Lehmann <aaron.lehmann@docker.com>