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/auth/auth.go

@@ -0,0 +1,41 @@
+package auth
+
+import (
+	"github.com/docker/cli/cli/config/configfile"
+	"github.com/docker/docker/api/types"
+	"github.com/docker/docker/registry"
+)
+
+// Lookup defines a method for looking up authentication information
+type Lookup interface {
+	All() map[string]types.AuthConfig
+	Lookup(repoInfo *registry.RepositoryInfo) types.AuthConfig
+}
+
+// ConfigLookup implements AuthLookup by reading a Docker config file
+type ConfigLookup struct {
+	*configfile.ConfigFile
+}
+
+// NewConfigLookup creates a new ConfigLookup for a given context
+func NewConfigLookup(configfile *configfile.ConfigFile) *ConfigLookup {
+	return &ConfigLookup{
+		ConfigFile: configfile,
+	}
+}
+
+// Lookup uses a Docker config file to lookup authentication information
+func (c *ConfigLookup) Lookup(repoInfo *registry.RepositoryInfo) types.AuthConfig {
+	if c.ConfigFile == nil || repoInfo == nil || repoInfo.Index == nil {
+		return types.AuthConfig{}
+	}
+	return registry.ResolveAuthConfig(c.ConfigFile.AuthConfigs, repoInfo.Index)
+}
+
+// All uses a Docker config file to get all authentication information
+func (c *ConfigLookup) All() map[string]types.AuthConfig {
+	if c.ConfigFile == nil {
+		return map[string]types.AuthConfig{}
+	}
+	return c.ConfigFile.AuthConfigs
+}