Update traefik dependencies (docker/docker and related) (#1823)

Update traefik dependencies (docker/docker and related)

- Update dependencies
- Fix compilation problems
- Remove vdemeester/docker-events (in docker api now)
- Remove `integration/vendor`
- Use `testImport`
- update some deps.
- regenerate the lock from scratch (after a `glide cc`)

vendor/github.com/docker/go-connections/sockets/sockets_windows.go

@@ -2,11 +2,25 @@ package sockets
 
 import (
 	"net"
+	"net/http"
 	"time"
 
 	"github.com/Microsoft/go-winio"
 )
 
+func configureUnixTransport(tr *http.Transport, proto, addr string) error {
+	return ErrProtocolNotAvailable
+}
+
+func configureNpipeTransport(tr *http.Transport, proto, addr string) error {
+	// No need for compression in local communications.
+	tr.DisableCompression = true
+	tr.Dial = func(_, _ string) (net.Conn, error) {
+		return DialPipe(addr, defaultTimeout)
+	}
+	return nil
+}
+
 // DialPipe connects to a Windows named pipe.
 func DialPipe(addr string, timeout time.Duration) (net.Conn, error) {
 	return winio.DialPipe(addr, &timeout)