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/libcompose/version/version.go

@@ -0,0 +1,20 @@
+package version
+
+var (
+	// VERSION should be updated by hand at each release
+	VERSION = "0.4.0"
+
+	// GITCOMMIT will be overwritten automatically by the build system
+	GITCOMMIT = "HEAD"
+
+	// BUILDTIME will be overwritten automatically by the build system
+	BUILDTIME = ""
+
+	// SHOWWARNING might be overwritten by the build system to not show the warning
+	SHOWWARNING = "true"
+)
+
+// ShowWarning returns wether the warning should be printed or not
+func ShowWarning() bool {
+	return SHOWWARNING != "false"
+}