Adding logging for the gRPC channel as default and host configuration for mininet topo

Change-Id: I3e5fe43c68f8003ea0279c11f64d7429aa82cf1b
diff --git a/VERSION b/VERSION
index 26aaba0..538ee20 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-1.2.0
+1.2.1-dev