Log TRAU FSM at INFO not NOTICE

During normal operations, osmo-mgw floods the log/vty at level NOTICE with:

 Received Event RX_BITS (trau_sync.c:525)

Change-Id: Ib4c5ac130e766906361c63090b30111970343075
diff --git a/tests/trau_sync/trau_sync_test.c b/tests/trau_sync/trau_sync_test.c
index 88b5c6d..4e41dd2 100644
--- a/tests/trau_sync/trau_sync_test.c
+++ b/tests/trau_sync/trau_sync_test.c
@@ -84,5 +84,6 @@
 	log_set_print_filename2(osmo_stderr_target, LOG_FILENAME_NONE);
 	log_set_print_category(osmo_stderr_target, 0);
 	log_set_print_category_hex(osmo_stderr_target, 0);
+	log_set_log_level(osmo_stderr_target, LOGL_INFO);
 	test_body();
 }