VOL-3588 Update OFAgent to support new version of protos

Change-Id: Ic3944779f9a600ebcd5d7a916616f473059e311e
diff --git a/internal/pkg/openflow/role.go b/internal/pkg/openflow/role.go
index d522bb2..41008aa 100644
--- a/internal/pkg/openflow/role.go
+++ b/internal/pkg/openflow/role.go
@@ -21,7 +21,7 @@
 	"encoding/json"
 	"github.com/opencord/goloxi"
 	ofp "github.com/opencord/goloxi/of13"
-	"github.com/opencord/voltha-lib-go/v3/pkg/log"
+	"github.com/opencord/voltha-lib-go/v4/pkg/log"
 )
 
 func (ofc *OFConnection) handleRoleRequest(ctx context.Context, request *ofp.RoleRequest) {