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/project/project_containers.go

@@ -0,0 +1,49 @@
+package project
+
+import (
+	"fmt"
+
+	"golang.org/x/net/context"
+
+	"github.com/docker/libcompose/project/events"
+)
+
+// Containers lists the containers for the specified services. Can be filter using
+// the Filter struct.
+func (p *Project) Containers(ctx context.Context, filter Filter, services ...string) ([]string, error) {
+	containers := []string{}
+	err := p.forEach(services, wrapperAction(func(wrapper *serviceWrapper, wrappers map[string]*serviceWrapper) {
+		wrapper.Do(nil, events.NoEvent, events.NoEvent, func(service Service) error {
+			serviceContainers, innerErr := service.Containers(ctx)
+			if innerErr != nil {
+				return innerErr
+			}
+
+			for _, container := range serviceContainers {
+				running := container.IsRunning(ctx)
+				switch filter.State {
+				case Running:
+					if !running {
+						continue
+					}
+				case Stopped:
+					if running {
+						continue
+					}
+				case AnyState:
+					// Don't do a thing
+				default:
+					// Invalid state filter
+					return fmt.Errorf("Invalid container filter: %s", filter.State)
+				}
+				containerID := container.ID()
+				containers = append(containers, containerID)
+			}
+			return nil
+		})
+	}), nil)
+	if err != nil {
+		return nil, err
+	}
+	return containers, nil
+}