*: update import paths to use versioned services

Signed-off-by: Stephen J Day <stephen.day@docker.com>

services/content/reader.go

@@ -3,7 +3,7 @@ package content
 import (
 	"context"
 
-	contentapi "github.com/containerd/containerd/api/services/content"
+	contentapi "github.com/containerd/containerd/api/services/content/v1"
 	digest "github.com/opencontainers/go-digest"
 )
 

services/content/service.go

@@ -5,7 +5,7 @@ import (
 	"sync"
 
 	"github.com/Sirupsen/logrus"
-	api "github.com/containerd/containerd/api/services/content"
+	api "github.com/containerd/containerd/api/services/content/v1"
 	"github.com/containerd/containerd/api/types/event"
 	"github.com/containerd/containerd/content"
 	"github.com/containerd/containerd/events"

services/content/store.go

@@ -4,7 +4,7 @@ import (
 	"context"
 	"io"
 
-	contentapi "github.com/containerd/containerd/api/services/content"
+	contentapi "github.com/containerd/containerd/api/services/content/v1"
 	"github.com/containerd/containerd/content"
 	digest "github.com/opencontainers/go-digest"
 )

services/content/writer.go

@@ -3,7 +3,7 @@ package content
 import (
 	"io"
 
-	contentapi "github.com/containerd/containerd/api/services/content"
+	contentapi "github.com/containerd/containerd/api/services/content/v1"
 	"github.com/containerd/containerd/content"
 	digest "github.com/opencontainers/go-digest"
 	"github.com/pkg/errors"