Upgrade Python dependencies #538

Job	Run time
Test aip-encrypt on Firefox	21m 26s
Test aip-encrypt on Chrome	19m 52s
Test aip-encrypt-mirror on Firefox	15m 28s
Test aip-encrypt-mirror on Chrome	14m 43s
Test black-box on Chrome	34m 53s
Test icc on Firefox	15m 38s
Test icc on Chrome	14m 5s
Test ipc preservation on Firefox	19m 46s
Test ipc preservation on Chrome	19m 0s
Test ipc access on Firefox	19m 31s
Test ipc access on Chrome	19m 10s
Test metadata-xml on Firefox	21m 33s
Test metadata-xml on Chrome	21m 29s
Test tcc on Firefox	15m 12s
Test tcc on Chrome	14m 5s
Test tpc on Firefox	15m 23s
Test tpc on Chrome	15m 2s
Test uuids-dirs on Firefox	14m 4s
Test uuids-dirs on Chrome	14m 8s
	5h 44m 28s

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