VOL-1643 Update voltha-go to use voltha-protos and voltha-lib-go v3.0.0

Change-Id: I86744943d59de38e9285ed7f53adc49c3b047e62
diff --git a/ro_core/config/config.go b/ro_core/config/config.go
index 5084130..8d856ff 100644
--- a/ro_core/config/config.go
+++ b/ro_core/config/config.go
@@ -22,7 +22,7 @@
 	"os"
 	"time"
 
-	"github.com/opencord/voltha-lib-go/v2/pkg/log"
+	"github.com/opencord/voltha-lib-go/v3/pkg/log"
 )
 
 // RO Core service default constants