Fix PythonQtGenerator external project
Fix PythonQtGenerator external project

* Remove extra SOURCE_DIR argument and set PYTHONQTGENERATOR_EXECUTABLE
to the correct path

Sardge/CTK,fedorov/CTK,pieper/CTK,Heather/CTK,mehrtash/CTK,danielknorr/CTK,laurennlam/CTK,Sardge/CTK,Heather/CTK,sankhesh/CTK,lassoan/CTK,rkhlebnikov/CTK,fedorov/CTK,AndreasFetzer/CTK,Sardge/CTK,151706061/CTK,jcfr/CTK,fedorov/CTK,laurennlam/CTK,Heather/CTK,Sardge/CTK,msmolens/CTK,laurennlam/CTK,commontk/CTK,SINTEFMedtek/CTK,espakm/CTK,danielknorr/CTK,danielknorr/CTK,SINTEFMedtek/CTK,jcfr/CTK,ddao/CTK,vovythevov/CTK,jcfr/CTK,sankhesh/CTK,pieper/CTK,vovythevov/CTK,naucoin/CTK,espakm/CTK,rkhlebnikov/CTK,CJGoch/CTK,pieper/CTK,sankhesh/CTK,lassoan/CTK,151706061/CTK,pieper/CTK,mehrtash/CTK,SINTEFMedtek/CTK,commontk/CTK,finetjul/CTK,Heather/CTK,naucoin/CTK,ddao/CTK,espakm/CTK,SINTEFMedtek/CTK,commontk/CTK,151706061/CTK,jcfr/CTK,msmolens/CTK,vovythevov/CTK,rkhlebnikov/CTK,SINTEFMedtek/CTK,lassoan/CTK,CJGoch/CTK,sankhesh/CTK,ddao/CTK,naucoin/CTK,CJGoch/CTK,lassoan/CTK,151706061/CTK,finetjul/CTK,mehrtash/CTK,fedorov/CTK,naucoin/CTK,msmolens/CTK,jcfr/CTK,danielknorr/CTK,CJGoch/CTK,151706061/CTK,AndreasFetzer/CTK,ddao/CTK,CJGoch/CTK,laurennlam/CTK,mehrtash/CTK,rkhlebnikov/CTK,AndreasFetzer/CTK,commontk/CTK,finetjul/CTK,AndreasFetzer/CTK,msmolens/CTK,espakm/CTK,finetjul/CTK,vovythevov/CTK