Require a name when making a simulated event loop

We need application names for both timing reports and for maps.  So,
lets require the names everywhere.

Change-Id: I82bf63e2500d0552bc0bb01380f67c5328e9b201
diff --git a/frc971/wpilib/loop_output_handler_test.cc b/frc971/wpilib/loop_output_handler_test.cc
index d7ef8cd..f1d403c 100644
--- a/frc971/wpilib/loop_output_handler_test.cc
+++ b/frc971/wpilib/loop_output_handler_test.cc
@@ -36,8 +36,9 @@
                     "}\n",
                     aos::Configuration::MiniReflectTypeTable())))),
         event_loop_factory_(&configuration_.message()),
-        loop_output_hander_event_loop_(event_loop_factory_.MakeEventLoop()),
-        test_event_loop_(event_loop_factory_.MakeEventLoop()) {
+        loop_output_hander_event_loop_(
+            event_loop_factory_.MakeEventLoop("output")),
+        test_event_loop_(event_loop_factory_.MakeEventLoop("test")) {
     ::aos::testing::EnableTestLogging();
   }