fixed kubernetes name resolver signature

Author: saturnism

kubernetes-lb-example/echo-client-lb-api/src/main/java/com/example/grpc/client/KubernetesNameResolver.java

@@ -1,7 +1,6 @@
 package com.example.grpc.client;
 
 import io.fabric8.kubernetes.api.model.Endpoints;
-import io.fabric8.kubernetes.api.model.Service;
 import io.fabric8.kubernetes.client.DefaultKubernetesClient;
 import io.fabric8.kubernetes.client.KubernetesClient;
 import io.fabric8.kubernetes.client.KubernetesClientException;
@@ -10,21 +9,16 @@
 import io.grpc.EquivalentAddressGroup;
 import io.grpc.NameResolver;
 import io.grpc.internal.SharedResourceHolder;
-import io.netty.resolver.InetSocketAddressResolver;
 
 import javax.annotation.concurrent.GuardedBy;
-import java.net.Inet4Address;
-import java.net.InetAddress;
 import java.net.InetSocketAddress;
-import java.net.SocketAddress;
 import java.util.ArrayList;
 import java.util.Collections;
 import java.util.List;
+import java.util.concurrent.Executor;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.ScheduledExecutorService;
 import java.util.concurrent.TimeUnit;
-import java.util.concurrent.atomic.AtomicBoolean;
-import java.util.stream.Collectors;
 
 /**
  * Created by rayt on 6/22/17.
@@ -35,14 +29,14 @@ public class KubernetesNameResolver extends NameResolver {
   private final int port;
   private final Attributes params;
   private final SharedResourceHolder.Resource<ScheduledExecutorService> timerServiceResource;
-  private final SharedResourceHolder.Resource<ExecutorService> sharedChannelExecutorResource;
+  private final SharedResourceHolder.Resource<Executor> sharedChannelExecutorResource;
   private final KubernetesClient kubernetesClient;
   private Listener listener;
 
   private volatile boolean refreshing = false;
   private volatile boolean watching = false;
 
-  public KubernetesNameResolver(String namespace, String name, int port, Attributes params, SharedResourceHolder.Resource<ScheduledExecutorService> timerServiceResource, SharedResourceHolder.Resource<ExecutorService> sharedChannelExecutorResource) {
+  public KubernetesNameResolver(String namespace, String name, int port, Attributes params, SharedResourceHolder.Resource<ScheduledExecutorService> timerServiceResource, SharedResourceHolder.Resource<Executor> sharedChannelExecutorResource) {
     this.namespace = namespace;
     this.name = name;
     this.port = port;