*: appc/cni -> containernetworking/cni

The project has been moved so internally we simply rename everything.
Consumers are recommended to update their vendored version of cni.

pkg/ns/ns_test.go

@@ -22,8 +22,8 @@ import (
 	"os/exec"
 	"path/filepath"
 
-	"github.com/appc/cni/pkg/ns"
-	"github.com/appc/cni/pkg/testhelpers"
+	"github.com/containernetworking/cni/pkg/ns"
+	"github.com/containernetworking/cni/pkg/testhelpers"
 	. "github.com/onsi/ginkgo"
 	. "github.com/onsi/gomega"
 )