add possibility to download to OCI image-layout

- vendor containers/image c703326038d30c3422168dd9a1a5afaf51740331
- fix copy tests relying on v2s1 manifests

Signed-off-by: Antonio Murdaca <runcom@redhat.com>

vendor/github.com/containers/image/docker/docker_image_dest.go

@@ -8,8 +8,8 @@ import (
 	"net/http"
 
 	"github.com/Sirupsen/logrus"
-	"github.com/containers/image/manifest"
 	"github.com/containers/image/docker/reference"
+	"github.com/containers/image/manifest"
 	"github.com/containers/image/types"
 )
 
@@ -36,6 +36,15 @@ func NewDockerImageDestination(img, certPath string, tlsVerify bool) (types.Imag
 	}, nil
 }
 
+func (d *dockerImageDestination) SupportedManifestMIMETypes() []string {
+	return []string{
+		// TODO(runcom): we'll add OCI as part of another PR here
+		manifest.DockerV2Schema2MIMEType,
+		manifest.DockerV2Schema1SignedMIMEType,
+		manifest.DockerV2Schema1MIMEType,
+	}
+}
+
 func (d *dockerImageDestination) CanonicalDockerReference() (string, error) {
 	return fmt.Sprintf("%s:%s", d.ref.Name(), d.tag), nil
 }