Reduce diff

src/proto/grpc/testing/control.proto

@@ -135,12 +135,13 @@ message ServerConfig {
   int32 port = 4;
   // Only for async server. Number of threads used to serve the requests.
   int32 async_server_threads = 7;
+  // Specify the number of cores to limit server to, if desired
+  int32 core_limit = 8;
   // payload config, used in generic server
   PayloadConfig payload_config = 9;
 
   // Specify the cores we should run the server on, if desired
   repeated int32 core_list = 10;
-  int32 core_limit = 11;
 }
 
 message ServerArgs {