fix branch on sandag external test (#978) #1009

Job	Run time
linux-64-py	5m 44s
random_seed_generation_test	3m 17s
win-64	9m 17s
macOS	6m 7s
Standard 2-Zone Example (SANDAG)	1h 16m 50s
prototype_marin	1m 39s
Standard 1-Zone Example (MTC)	48m 34s
placeholder_psrc	50m 44s
prototype_sandag_xborder	6m 16s
placeholder_sandag	2h 40m 16s
develop-docbuild	3m 3s
prototype_mtc_extended	1h 22m 6s
production_semcog	6m 45s
placeholder_multiple_zone	11m 16s
Estimation Mode Unit Tests	8m 36s
prototype_mwcog	51m 50s
Expression Profiling Tests	8m 23s
prototype_mtc	52m 12s
	9h 52m 55s

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