Minor renames of tests #3801

Job	Run time
build	3m 41s
test_when_cache_missing	0s
test_when_cache_present (0, 9, 636)	21m 35s
test_when_cache_present (1, 9, 636)	23m 37s
test_when_cache_present (2, 9, 636)	21m 17s
test_when_cache_present (3, 9, 636)	22m 30s
test_when_cache_present (4, 9, 636)	21m 56s
test_when_cache_present (5, 9, 636)	21m 46s
test_when_cache_present (6, 9, 636)	22m 23s
test_when_cache_present (7, 9, 636)	26m 7s
test_when_cache_present (8, 9, 636)	24m 44s
test_when_cache_present (9, 9, 636)	12m 28s
save_test_times_when_cache_missing	0s
save_test_times_when_cache_present	5s
	3h 42m 9s

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