Nightly unit tests, linux #551

Job	Run time
Nightly 3.8 git-test-automl	24m 58s
Nightly 3.8 git-test-modelunderstanding	10m 7s
Nightly 3.8 git-test-other	9m 49s
Nightly 3.8 git-test-parallel	6m 20s
Nightly 3.8 git-test-prophet	6m 11s
Nightly 3.9 git-test-automl	17m 12s
Nightly 3.9 git-test-modelunderstanding	10m 17s
Nightly 3.9 git-test-other	9m 30s
Nightly 3.9 git-test-parallel	4m 44s
Nightly 3.9 git-test-prophet	7m 23s
	1h 46m 31s

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