Fix shadowed assignment

Prior, a modified object error was encountered when updating phase
because object returned from earlier update was not assigned to
config in outer scope. Now, correct config variable is being used
and modified error is not encountered.

controller/eks-cluster-config-handler.go

@@ -329,7 +329,7 @@ func (h *Handler) create(config *v13.EKSClusterConfig, sess *session.Session, ek
 		config.Spec.Subnets = strings.Split(subnetIdsString, ",")
 		subnetIds = aws.StringSlice(config.Spec.Subnets)
 
-		config, err := h.eksCC.Update(config)
+		config, err = h.eksCC.Update(config)
 		if err != nil {
 			return config, err
 		}