Fix broken aws tests (#2658)
Fix broken aws tests (#2658)

* Require minimum botocore version with s3transfer>=0.2.0 compatibility

* Replace min botocore version with locked s3transfer version

riga/luigi,dlstadther/luigi,spotify/luigi,jamesmcm/luigi,soxofaan/luigi,adaitche/luigi,spotify/luigi,spotify/luigi,PeteW/luigi,riga/luigi,soxofaan/luigi,rayrrr/luigi,dlstadther/luigi,rayrrr/luigi,adaitche/luigi,riga/luigi,soxofaan/luigi,rayrrr/luigi,adaitche/luigi,soxofaan/luigi,dlstadther/luigi,PeteW/luigi,jamesmcm/luigi,rayrrr/luigi,PeteW/luigi,spotify/luigi,PeteW/luigi,jamesmcm/luigi,jamesmcm/luigi,adaitche/luigi,dlstadther/luigi,riga/luigi