rear_wheel_feedback clean up and add test code

tests/test_rear_wheel_feedback.py

@@ -0,0 +1,15 @@
+from unittest import TestCase
+
+import sys
+sys.path.append("./PathTracking/rear_wheel_feedback/")
+
+from PathTracking.rear_wheel_feedback import rear_wheel_feedback as m
+
+print(__file__)
+
+
+class Test(TestCase):
+
+    def test1(self):
+        m.show_animation = False
+        m.main()