Always return status in requested order

Summary:
Change `wa_raft_server:status/2` to always return the requested status fields in the order that they
are requested in.

Reviewed By: jaher

Differential Revision: D70842264

fbshipit-source-id: 395d10e7f0d204dfc79b73b0641f4e4d8d8001b4

src/wa_raft_server.erl

@@ -358,14 +358,7 @@ status(ServerRef, Key) when is_atom(Key) ->
 status(ServerRef, Keys) when is_list(Keys) ->
     case status(ServerRef) of
         [_|_] = Status ->
-            FilterFun =
-                fun({Key, Value}) ->
-                    case lists:member(Key, Keys) of
-                        true -> {true, Value};
-                        false -> false
-                    end
-                end,
-            lists:filtermap(FilterFun, Status);
+            [proplists:get_value(Key, Status, undefined) || Key <- Keys];
         _ ->
             lists:duplicate(length(Keys), undefined)
     end.