Allow Qt lib selection from environment variable for testing Cover up some QtTest differences between PyQt4 / PyQt5
Allow Qt lib selection from environment variable for testing
Cover up some QtTest differences between PyQt4 / PyQt5

mgraupe/acq4,mgraupe/acq4,mgraupe/acq4,acq4/acq4,meganbkratz/acq4,pbmanis/acq4,mgraupe/acq4,acq4/acq4,pbmanis/acq4,campagnola/acq4,pbmanis/acq4,campagnola/acq4,meganbkratz/acq4,pmaunz/pyqtgraph,meganbkratz/acq4,pbmanis/acq4,campagnola/acq4,campagnola/acq4,pmaunz/pyqtgraph,mgraupe/acq4,acq4/acq4,meganbkratz/acq4,acq4/acq4