VOL-2458 update to latest voltha-lib-go & protos for timestamp changes

Change-Id: Ia555c0320bc41ef4fa3a615f3db46feba5ff752a
diff --git a/VERSION b/VERSION
index 0bee604..3f684d2 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-2.3.3
+2.3.4