Add tests for pigpio

builder/image-validate.sh

@@ -26,6 +26,7 @@ cd /home/pi/catkin_ws/src/clover/builder/test/
 ./tests.sh
 ./tests.py
 ./tests_py3.py
+./test_pigpio.py
 [[ $(./test_qr.py) == "Found QRCODE with data Проверка Unicode with center at x=66.0, y=66.0" ]] 
 [[ $(./tests_clever.py) == "Warning: clever package is renamed to clover" ]]  # test backwards compatibility