tests/fsm_test.c: Disable use color in logging output

This should avoid other problems in the future.

Change-Id: I81368578c0830477d381566a54671fdde6067b23
diff --git a/tests/fsm/fsm_test.c b/tests/fsm/fsm_test.c
index 911aad8..fe48b2b 100644
--- a/tests/fsm/fsm_test.c
+++ b/tests/fsm/fsm_test.c
@@ -413,6 +413,7 @@
 	stderr_target = log_target_create_stderr();
 	log_add_target(stderr_target);
 	log_set_print_filename(stderr_target, 0);
+	log_set_use_color(stderr_target, 0);
 	g_ctrl = ctrl_handle_alloc(NULL, NULL, NULL);
 
 	g_ctx = NULL;