Rename request proto field.

Author: kannanjgithub

interop-testing/src/main/java/io/grpc/testing/integration/TestServiceClient.java

@@ -1118,7 +1118,7 @@ public void testMcs(TestServiceGrpc.TestServiceStub asyncStub) throws Exception
           asyncStub.fullDuplexCall(responseObserver1);
       StreamingOutputCallRequest request = StreamingOutputCallRequest.newBuilder()
           .addResponseParameters(ResponseParameters.newBuilder()
-              .setFillClientSocketAddress(
+              .setFillPeerSocketAddress(
                   Messages.BoolValue.newBuilder().setValue(true).build())
               .build())
           .build();

interop-testing/src/main/java/io/grpc/testing/integration/TestServiceImpl.java

@@ -256,7 +256,7 @@ private boolean whetherSendClientSocketAddressInResponse(StreamingOutputCallRequ
         Iterator<ResponseParameters> responseParametersIterator =
             request.getResponseParametersList().iterator();
         while (responseParametersIterator.hasNext()) {
-          if (responseParametersIterator.next().getFillClientSocketAddress().getValue()) {
+          if (responseParametersIterator.next().getFillPeerSocketAddress().getValue()) {
             return true;
           }
         }

interop-testing/src/main/proto/grpc/testing/messages.proto

@@ -160,9 +160,9 @@ message ResponseParameters {
   // the response's compression status.
   BoolValue compressed = 3;
 
-  // Whether to request the server to send the requesting client's socket
+  // Whether to request the server to send the requesting peer's socket
   // address in the response.
-  BoolValue fill_client_socket_address = 4;
+  BoolValue fill_peer_socket_address = 4;
 }
 
 // Server-streaming request.