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`)

integration/vendor/github.com/Azure/go-ansiterm/osc_string_state.go

@@ -1,31 +0,0 @@
-package ansiterm
-
-type oscStringState struct {
-	baseState
-}
-
-func (oscState oscStringState) Handle(b byte) (s state, e error) {
-	logger.Infof("OscString::Handle %#x", b)
-	nextState, err := oscState.baseState.Handle(b)
-	if nextState != nil || err != nil {
-		return nextState, err
-	}
-
-	switch {
-	case isOscStringTerminator(b):
-		return oscState.parser.ground, nil
-	}
-
-	return oscState, nil
-}
-
-// See below for OSC string terminators for linux
-// http://man7.org/linux/man-pages/man4/console_codes.4.html
-func isOscStringTerminator(b byte) bool {
-
-	if b == ANSI_BEL || b == 0x5C {
-		return true
-	}
-
-	return false
-}