VOL-1900 lint warning fixes db

Change-Id: Iaa4e5c271c9e1d7c8ebce1e13c7e723ea4762304
diff --git a/rw_core/core/logical_device_agent.go b/rw_core/core/logical_device_agent.go
index 097f9ab..776a0fa 100644
--- a/rw_core/core/logical_device_agent.go
+++ b/rw_core/core/logical_device_agent.go
@@ -199,7 +199,7 @@
 	}
 	// TODO:  Use a port proxy once the POST_ADD is fixed
 	if agent.ldProxy != nil {
-		agent.ldProxy.RegisterCallback(model.POST_UPDATE, agent.portUpdated)
+		agent.ldProxy.RegisterCallback(model.PostUpdate, agent.portUpdated)
 	} else {
 		log.Errorw("logical-device-proxy-null", log.Fields{"logicalDeviceId": agent.logicalDeviceID})
 		return status.Error(codes.Internal, "logical-device-proxy-null")