VOL-3938 - support custom configuration to etcdclient

also enables grpc reflection to the voltha grpc api

Change-Id: Ib7f6d214e5fcd1decd4ef875e03a31e3319555e2
diff --git a/VERSION b/VERSION
index 5fb11aa..fae6e3d 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-4.2.0-dev
+4.2.1