Use 1.18.x OS packages in the Dockerfile #723

Job	Run time
Test aip-encrypt on Firefox	21m 33s
Test aip-encrypt on Chrome	19m 23s
Test aip-encrypt-mirror on Firefox	12m 20s
Test aip-encrypt-mirror on Chrome	12m 23s
Test black-box on Chrome	28m 49s
Test icc on Firefox	13m 6s
Test icc on Chrome	12m 43s
Test ipc preservation on Firefox	17m 12s
Test ipc preservation on Chrome	16m 52s
Test ipc access on Firefox	16m 31s
Test ipc access on Chrome	15m 45s
Test man-norm on Firefox	11m 29s
Test man-norm on Chrome	11m 36s
Test metadata-xml on Firefox	19m 38s
Test metadata-xml on Chrome	18m 5s
Test tcc on Firefox	13m 22s
Test tcc on Chrome	12m 52s
Test tpc on Firefox	14m 22s
Test tpc on Chrome	12m 51s
Test uuids-dirs on Firefox	13m 36s
Test uuids-dirs on Chrome	12m 29s
	5h 26m 57s

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