Use strptime instead of dateutil.parse
Use strptime instead of dateutil.parse

Fixes TOOLS-449

gholms/euca2ools,nagyistoce/euca2ools,vasiliykochergin/euca2ools,jhajek/euca2ools,jhajek/euca2ools,gholms/euca2ools,vasiliykochergin/euca2ools,nagyistoce/euca2ools