兼容获取pod列表，serviceName为空的清空

src/main/java/cn/qg/holmes/service/k8s/K8sService.java

@@ -324,7 +324,7 @@ public class K8sService {
         // 对象转列表
         List<Map<String, Object>> resultList = new ArrayList<>();
         for (Map<String, Object> map: podServiceMap.values()) {
-            if (map != null) {
+            if ((map != null) && (map.get("serviceName") != null))  {
                 resultList.add(map);
             }
         }