Correct spelling errors in the network protocol. (#3091)

* Correct spelling errors in the network protocol.

* update protocol submodule commit id.

proto @ 7b244ff7

-Subproject commit ef3f6f0c18db9e4d11dbdd7ceacd16df456c3a1b
+Subproject commit 7b244ff7ec350910295eee85633e02d92a6f6b1c

apm-sniffer/apm-agent-core/src/main/java/org/apache/skywalking/apm/agent/core/dictionary/EndpointNameDictionary.java

@@ -19,17 +19,11 @@
 package org.apache.skywalking.apm.agent.core.dictionary;
 
 import io.netty.util.internal.ConcurrentSet;
-import java.util.Map;
-import java.util.Set;
+import java.util.*;
 import java.util.concurrent.ConcurrentHashMap;
-import org.apache.skywalking.apm.agent.core.logging.api.ILog;
-import org.apache.skywalking.apm.agent.core.logging.api.LogManager;
+import org.apache.skywalking.apm.agent.core.logging.api.*;
 import org.apache.skywalking.apm.network.common.DetectPoint;
-import org.apache.skywalking.apm.network.register.v2.Endpoint;
-import org.apache.skywalking.apm.network.register.v2.EndpointMapping;
-import org.apache.skywalking.apm.network.register.v2.EndpointMappingElement;
-import org.apache.skywalking.apm.network.register.v2.Enpoints;
-import org.apache.skywalking.apm.network.register.v2.RegisterGrpc;
+import org.apache.skywalking.apm.network.register.v2.*;
 
 import static org.apache.skywalking.apm.agent.core.conf.Config.Dictionary.ENDPOINT_NAME_BUFFER_SIZE;
 
@@ -73,7 +67,7 @@ public enum EndpointNameDictionary {
     public void syncRemoteDictionary(
         RegisterGrpc.RegisterBlockingStub serviceNameDiscoveryServiceBlockingStub) {
         if (unRegisterEndpoints.size() > 0) {
-            Enpoints.Builder builder = Enpoints.newBuilder();
+            Endpoints.Builder builder = Endpoints.newBuilder();
             for (OperationNameKey operationNameKey : unRegisterEndpoints) {
                 Endpoint endpoint = Endpoint.newBuilder()
                     .setServiceId(operationNameKey.getServiceId())

oap-server/server-receiver-plugin/skywalking-register-receiver-plugin/src/main/java/org/apache/skywalking/oap/server/receiver/register/provider/handler/v6/grpc/RegisterServiceHandler.java

@@ -130,7 +130,7 @@ public class RegisterServiceHandler extends RegisterGrpc.RegisterImplBase implem
         responseObserver.onCompleted();
     }
 
-    @Override public void doEndpointRegister(Enpoints request, StreamObserver<EndpointMapping> responseObserver) {
+    @Override public void doEndpointRegister(Endpoints request, StreamObserver<EndpointMapping> responseObserver) {
         EndpointMapping.Builder builder = EndpointMapping.newBuilder();
 
         request.getEndpointsList().forEach(endpoint -> {