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/docker/client/client.go

@@ -0,0 +1,115 @@
+package client
+
+import (
+	"fmt"
+	"net/http"
+	"os"
+	"path/filepath"
+	"runtime"
+
+	cliconfig "github.com/docker/cli/cli/config"
+	"github.com/docker/docker/client"
+	"github.com/docker/docker/pkg/homedir"
+	"github.com/docker/go-connections/sockets"
+	"github.com/docker/go-connections/tlsconfig"
+	"github.com/docker/libcompose/version"
+)
+
+const (
+	// DefaultAPIVersion is the default docker API version set by libcompose
+	DefaultAPIVersion   = "v1.20"
+	defaultTrustKeyFile = "key.json"
+	defaultCaFile       = "ca.pem"
+	defaultKeyFile      = "key.pem"
+	defaultCertFile     = "cert.pem"
+)
+
+var (
+	dockerCertPath = os.Getenv("DOCKER_CERT_PATH")
+)
+
+func init() {
+	if dockerCertPath == "" {
+		dockerCertPath = cliconfig.Dir()
+	}
+}
+
+// Options holds docker client options (host, tls, ..)
+type Options struct {
+	TLS        bool
+	TLSVerify  bool
+	TLSOptions tlsconfig.Options
+	TrustKey   string
+	Host       string
+	APIVersion string
+}
+
+// Create creates a docker client based on the specified options.
+func Create(c Options) (client.APIClient, error) {
+	if c.Host == "" {
+		if os.Getenv("DOCKER_API_VERSION") == "" {
+			os.Setenv("DOCKER_API_VERSION", DefaultAPIVersion)
+		}
+		client, err := client.NewEnvClient()
+		if err != nil {
+			return nil, err
+		}
+		return client, nil
+	}
+
+	apiVersion := c.APIVersion
+	if apiVersion == "" {
+		apiVersion = DefaultAPIVersion
+	}
+
+	if c.TLSOptions.CAFile == "" {
+		c.TLSOptions.CAFile = filepath.Join(dockerCertPath, defaultCaFile)
+	}
+	if c.TLSOptions.CertFile == "" {
+		c.TLSOptions.CertFile = filepath.Join(dockerCertPath, defaultCertFile)
+	}
+	if c.TLSOptions.KeyFile == "" {
+		c.TLSOptions.KeyFile = filepath.Join(dockerCertPath, defaultKeyFile)
+	}
+	if c.TrustKey == "" {
+		c.TrustKey = filepath.Join(homedir.Get(), ".docker", defaultTrustKeyFile)
+	}
+	if c.TLSVerify {
+		c.TLS = true
+	}
+	if c.TLS {
+		c.TLSOptions.InsecureSkipVerify = !c.TLSVerify
+	}
+
+	var httpClient *http.Client
+	if c.TLS {
+		config, err := tlsconfig.Client(c.TLSOptions)
+		if err != nil {
+			return nil, err
+		}
+		tr := &http.Transport{
+			TLSClientConfig: config,
+		}
+		proto, addr, _, err := client.ParseHost(c.Host)
+		if err != nil {
+			return nil, err
+		}
+
+		if err := sockets.ConfigureTransport(tr, proto, addr); err != nil {
+			return nil, err
+		}
+
+		httpClient = &http.Client{
+			Transport: tr,
+		}
+	}
+
+	customHeaders := map[string]string{}
+	customHeaders["User-Agent"] = fmt.Sprintf("Libcompose-Client/%s (%s)", version.VERSION, runtime.GOOS)
+
+	client, err := client.NewClient(c.Host, apiVersion, httpClient, customHeaders)
+	if err != nil {
+		return nil, err
+	}
+	return client, nil
+}

vendor/github.com/docker/libcompose/docker/client/client_factory.go

@@ -0,0 +1,35 @@
+package client
+
+import (
+	"github.com/docker/docker/client"
+	"github.com/docker/libcompose/project"
+)
+
+// Factory is a factory to create docker clients.
+type Factory interface {
+	// Create constructs a Docker client for the given service. The passed in
+	// config may be nil in which case a generic client for the project should
+	// be returned.
+	Create(service project.Service) client.APIClient
+}
+
+type defaultFactory struct {
+	client client.APIClient
+}
+
+// NewDefaultFactory creates and returns the default client factory that uses
+// github.com/docker/docker client.
+func NewDefaultFactory(opts Options) (Factory, error) {
+	client, err := Create(opts)
+	if err != nil {
+		return nil, err
+	}
+
+	return &defaultFactory{
+		client: client,
+	}, nil
+}
+
+func (s *defaultFactory) Create(service project.Service) client.APIClient {
+	return s.client
+}