Move storagedriver package to registry/storage/driver

This change is slightly more complex than previous package maves in that the
package name changed. To address this, we simply always reference the package
driver as storagedriver to avoid compatbility issues with existing code. While
unfortunate, this can be cleaned up over time.

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

docs/storage/driver/filesystem/driver_test.go

@@ -0,0 +1,29 @@
+package filesystem
+
+import (
+	"io/ioutil"
+	"os"
+	"testing"
+
+	storagedriver "github.com/docker/distribution/registry/storage/driver"
+	"github.com/docker/distribution/registry/storage/driver/testsuites"
+	. "gopkg.in/check.v1"
+)
+
+// Hook up gocheck into the "go test" runner.
+func Test(t *testing.T) { TestingT(t) }
+
+func init() {
+	root, err := ioutil.TempDir("", "driver-")
+	if err != nil {
+		panic(err)
+	}
+	defer os.Remove(root)
+
+	testsuites.RegisterInProcessSuite(func() (storagedriver.StorageDriver, error) {
+		return New(root), nil
+	}, testsuites.NeverSkip)
+
+	// BUG(stevvooe): IPC is broken so we're disabling for now. Will revisit later.
+	// testsuites.RegisterIPCSuite(driverName, map[string]string{"rootdirectory": root}, testsuites.NeverSkip)
+}