Upgrade Python requirements #670

Job	Run time
Test aip-encrypt on Firefox	19m 40s
Test aip-encrypt on Chrome	19m 31s
Test aip-encrypt-mirror on Firefox	12m 35s
Test aip-encrypt-mirror on Chrome	12m 54s
Test black-box on Chrome	30m 3s
Test icc on Firefox	13m 44s
Test icc on Chrome	13m 24s
Test ipc preservation on Firefox	1m 1s
Test ipc preservation on Chrome	17m 57s
Test ipc access on Firefox	18m 44s
Test ipc access on Chrome	17m 35s
Test metadata-xml on Firefox	19m 58s
Test metadata-xml on Chrome	18m 59s
Test tcc on Firefox	13m 5s
Test tcc on Chrome	13m 7s
Test tpc on Firefox	13m 37s
Test tpc on Chrome	13m 52s
Test uuids-dirs on Firefox	13m 58s
Test uuids-dirs on Chrome	13m 29s
	4h 57m 13s

Provide feedback