[VOL-2782] Update go.mod of voltha-go,open-olt-adapter,ofagent-go and voltctl to be compatible with latest version of voltha-lig-go

Change-Id: Ib377da4604a18c2e1505e3f3423703fc1d16f9d4
diff --git a/rw_core/main.go b/rw_core/main.go
index 3068c98..2cc5240 100644
--- a/rw_core/main.go
+++ b/rw_core/main.go
@@ -115,7 +115,7 @@
 		log.Fatal(err)
 	}
 	cm := conf.NewConfigManager(rw.kvClient, rw.config.KVStoreType, rw.config.KVStoreHost, rw.config.KVStorePort, rw.config.KVStoreTimeout)
-	go conf.ProcessLogConfigChange(cm, ctx)
+	go conf.StartLogLevelConfigProcessing(cm, ctx)
 
 	// Setup KV transaction context
 	if err := c.SetTransactionContext(instanceID,