VOL-2138 Use v2 import paths for voltha-lib-go

Change-Id: I853dcce79c4defbe3140f3893651a2f50d63e053
diff --git a/rw_core/core/grpc_nbi_api_handler.go b/rw_core/core/grpc_nbi_api_handler.go
index 44520c4..e97956a 100755
--- a/rw_core/core/grpc_nbi_api_handler.go
+++ b/rw_core/core/grpc_nbi_api_handler.go
@@ -21,7 +21,7 @@
 	"github.com/golang/protobuf/ptypes/empty"
 	da "github.com/opencord/voltha-go/common/core/northbound/grpc"
 	"github.com/opencord/voltha-go/rw_core/utils"
-	"github.com/opencord/voltha-lib-go/pkg/log"
+	"github.com/opencord/voltha-lib-go/v2/pkg/log"
 	"github.com/opencord/voltha-protos/go/common"
 	"github.com/opencord/voltha-protos/go/omci"
 	"github.com/opencord/voltha-protos/go/openflow_13"