kubernetes use in cluster (#882)

* refactor ：kubernetes use in cluster

* feat：delete KubeClient

src/Ocelot.Provider.Kubernetes/KubeRegistryConfiguration.cs

@@ -5,16 +5,8 @@ namespace Ocelot.Provider.Kubernetes
 {
     public class KubeRegistryConfiguration
     {
-        public Uri ApiEndPoint { get; set; }
-
         public string KubeNamespace { get; set; }
 
         public string KeyOfServiceInK8s { get; set; }
-
-        public KubeAuthStrategy AuthStrategy { get; set; }
-
-        public string AccessToken { get; set; }
-
-        public bool AllowInsecure { get; set; }
     }
 }