VOL-3874: DevicePmConfig has to updated to DB in the rw-core only on success response from adapter

- also revert to using github.com/golang/protobuf version 1.3.2

Change-Id: I149c48a61a8858169bd0903e6092376796dae212
diff --git a/go.mod b/go.mod
index 26d214d..deb76c4 100644
--- a/go.mod
+++ b/go.mod
@@ -4,7 +4,7 @@
 
 require (
 	github.com/gogo/protobuf v1.3.2
-	github.com/golang/protobuf v1.4.2
+	github.com/golang/protobuf v1.3.2
 	github.com/google/uuid v1.1.1
 	github.com/opencord/voltha-lib-go/v4 v4.0.10
 	github.com/opencord/voltha-protos/v4 v4.0.13