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/yaml/volume.go

@@ -0,0 +1,97 @@
+package yaml
+
+import (
+	"errors"
+	"fmt"
+	"sort"
+	"strings"
+)
+
+// Volumes represents a list of service volumes in compose file.
+// It has several representation, hence this specific struct.
+type Volumes struct {
+	Volumes []*Volume
+}
+
+// Volume represent a service volume
+type Volume struct {
+	Source      string `yaml:"-"`
+	Destination string `yaml:"-"`
+	AccessMode  string `yaml:"-"`
+}
+
+// Generate a hash string to detect service volume config changes
+func (v *Volumes) HashString() string {
+	if v == nil {
+		return ""
+	}
+	result := []string{}
+	for _, vol := range v.Volumes {
+		result = append(result, vol.String())
+	}
+	sort.Strings(result)
+	return strings.Join(result, ",")
+}
+
+// String implements the Stringer interface.
+func (v *Volume) String() string {
+	var paths []string
+	if v.Source != "" {
+		paths = []string{v.Source, v.Destination}
+	} else {
+		paths = []string{v.Destination}
+	}
+	if v.AccessMode != "" {
+		paths = append(paths, v.AccessMode)
+	}
+	return strings.Join(paths, ":")
+}
+
+// MarshalYAML implements the Marshaller interface.
+func (v Volumes) MarshalYAML() (interface{}, error) {
+	vs := []string{}
+	for _, volume := range v.Volumes {
+		vs = append(vs, volume.String())
+	}
+	return vs, nil
+}
+
+// UnmarshalYAML implements the Unmarshaller interface.
+func (v *Volumes) UnmarshalYAML(unmarshal func(interface{}) error) error {
+	var sliceType []interface{}
+	if err := unmarshal(&sliceType); err == nil {
+		v.Volumes = []*Volume{}
+		for _, volume := range sliceType {
+			name, ok := volume.(string)
+			if !ok {
+				return fmt.Errorf("Cannot unmarshal '%v' to type %T into a string value", name, name)
+			}
+			elts := strings.SplitN(name, ":", 3)
+			var vol *Volume
+			switch {
+			case len(elts) == 1:
+				vol = &Volume{
+					Destination: elts[0],
+				}
+			case len(elts) == 2:
+				vol = &Volume{
+					Source:      elts[0],
+					Destination: elts[1],
+				}
+			case len(elts) == 3:
+				vol = &Volume{
+					Source:      elts[0],
+					Destination: elts[1],
+					AccessMode:  elts[2],
+				}
+			default:
+				// FIXME
+				return fmt.Errorf("")
+			}
+			v.Volumes = append(v.Volumes, vol)
+		}
+		return nil
+	}
+
+	return errors.New("Failed to unmarshal Volumes")
+}