Switch from containers/image to go-containerregistry (#140)

* Vendor changes for go-containerregistry switch.

* Manual changes for go-containerregistry switch.

The biggest change is refactoring the tarball unpacking.

* Pull more of container-diff out.

* More vendor removals.

* More unit tests.

vendor/github.com/Microsoft/hcsshim/waithelper.go

@@ -1,63 +0,0 @@
-package hcsshim
-
-import (
-	"time"
-
-	"github.com/sirupsen/logrus"
-)
-
-func processAsyncHcsResult(err error, resultp *uint16, callbackNumber uintptr, expectedNotification hcsNotification, timeout *time.Duration) error {
-	err = processHcsResult(err, resultp)
-	if IsPending(err) {
-		return waitForNotification(callbackNumber, expectedNotification, timeout)
-	}
-
-	return err
-}
-
-func waitForNotification(callbackNumber uintptr, expectedNotification hcsNotification, timeout *time.Duration) error {
-	callbackMapLock.RLock()
-	channels := callbackMap[callbackNumber].channels
-	callbackMapLock.RUnlock()
-
-	expectedChannel := channels[expectedNotification]
-	if expectedChannel == nil {
-		logrus.Errorf("unknown notification type in waitForNotification %x", expectedNotification)
-		return ErrInvalidNotificationType
-	}
-
-	var c <-chan time.Time
-	if timeout != nil {
-		timer := time.NewTimer(*timeout)
-		c = timer.C
-		defer timer.Stop()
-	}
-
-	select {
-	case err, ok := <-expectedChannel:
-		if !ok {
-			return ErrHandleClose
-		}
-		return err
-	case err, ok := <-channels[hcsNotificationSystemExited]:
-		if !ok {
-			return ErrHandleClose
-		}
-		// If the expected notification is hcsNotificationSystemExited which of the two selects
-		// chosen is random. Return the raw error if hcsNotificationSystemExited is expected
-		if channels[hcsNotificationSystemExited] == expectedChannel {
-			return err
-		}
-		return ErrUnexpectedContainerExit
-	case _, ok := <-channels[hcsNotificationServiceDisconnect]:
-		if !ok {
-			return ErrHandleClose
-		}
-		// hcsNotificationServiceDisconnect should never be an expected notification
-		// it does not need the same handling as hcsNotificationSystemExited
-		return ErrUnexpectedProcessAbort
-	case <-c:
-		return ErrTimeout
-	}
-	return nil
-}