Move start request tracking before first produce in

both variations to track first metadata request as well

Author: emasab

tests/0146-metadata_mock.c

@@ -149,6 +149,7 @@ static void do_test_fast_metadata_refresh(int variation) {
 
         rk = test_create_handle(RD_KAFKA_PRODUCER, conf);
 
+        rd_kafka_mock_start_request_tracking(mcluster);
 
         if (variation == 1) {
                 /* Produce some messages to the topic
@@ -167,8 +168,6 @@ static void do_test_fast_metadata_refresh(int variation) {
                     mcluster, topic, RD_KAFKA_RESP_ERR_KAFKA_STORAGE_ERROR);
         }
 
-        rd_kafka_mock_start_request_tracking(mcluster);
-
         test_produce_msgs2(rk, topic, 0, 0, 0, 3, NULL, 5);
 
         /* Wait some time for seeing the retries */