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/config/convert.go

@@ -0,0 +1,44 @@
+package config
+
+import (
+	"github.com/docker/libcompose/utils"
+	"github.com/docker/libcompose/yaml"
+)
+
+// ConvertServices converts a set of v1 service configs to v2 service configs
+func ConvertServices(v1Services map[string]*ServiceConfigV1) (map[string]*ServiceConfig, error) {
+	v2Services := make(map[string]*ServiceConfig)
+	replacementFields := make(map[string]*ServiceConfig)
+
+	for name, service := range v1Services {
+		replacementFields[name] = &ServiceConfig{
+			Build: yaml.Build{
+				Context:    service.Build,
+				Dockerfile: service.Dockerfile,
+			},
+			Logging: Log{
+				Driver:  service.LogDriver,
+				Options: service.LogOpt,
+			},
+			NetworkMode: service.Net,
+		}
+
+		v1Services[name].Build = ""
+		v1Services[name].Dockerfile = ""
+		v1Services[name].LogDriver = ""
+		v1Services[name].LogOpt = nil
+		v1Services[name].Net = ""
+	}
+
+	if err := utils.Convert(v1Services, &v2Services); err != nil {
+		return nil, err
+	}
+
+	for name := range v2Services {
+		v2Services[name].Build = replacementFields[name].Build
+		v2Services[name].Logging = replacementFields[name].Logging
+		v2Services[name].NetworkMode = replacementFields[name].NetworkMode
+	}
+
+	return v2Services, nil
+}