time_periods_available unit test #264

Job	Run time
linux-64-py3.10	5m 9s
estimation_mode_test	16m 37s
macOS	9m 43s
prototype_mtc	46m 46s
win-64	11m 53s
develop-docbuild	0s
prototype_arc	53m 11s
prototype_mtc	49m 46s
placeholder_psrc	40m 40s
random_seed_generation_test	2m 18s
prototype_psrc_in_development	4m 0s
prototype_marin	1m 30s
prototype_mtc_extended	1m 36s
placeholder_sandag	2h 19m 45s
prototype_sandag_xborder	5m 28s
production_semcog	5m 15s
prototype_mwcog	52m 8s
placeholder_multiple_zone	7m 59s
	7h 33m 44s

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