fix datetime.now() in condor.py
fix datetime.now() in condor.py

we need to import datetime, and it should be datetime.datetime.now()

BioMedIA/MIRTK,schuhschuh/MIRTK,schuhschuh/MIRTK,BioMedIA/MIRTK,BioMedIA/MIRTK,BioMedIA/MIRTK,schuhschuh/MIRTK,schuhschuh/MIRTK