Move QR recognition test to a separate file

builder/image-validate.sh

@@ -25,6 +25,7 @@ cd /home/pi/catkin_ws/src/clover/builder/test/
 ./tests.sh
 ./tests.py
 ./tests_py3.py
+./test_qr.py
 [[ $(./tests_clever.py) == "Warning: clever package is renamed to clover" ]]  # test backwards compatibility
 
 echo "Move /etc/ld.so.preload back to its original position"

builder/test/tests.py

@@ -29,5 +29,3 @@ import pigpio
 from pyzbar import pyzbar
 
 print(cv2.getBuildInformation())
-
-from . import qr