fix branch on sandag external test #1006

Job	Run time
linux-64-py	5m 42s
placeholder_psrc	50m 18s
Estimation Mode Unit Tests	8m 26s
macOS	6m 58s
win-64	9m 25s
Standard 2-Zone Example (SANDAG)	1m 11s
placeholder_multiple_zone	11m 36s
prototype_mtc	53m 55s
Expression Profiling Tests	14m 6s
prototype_mwcog	58m 32s
Standard 1-Zone Example (MTC)	48m 19s
production_semcog	7m 22s
random_seed_generation_test	4m 6s
prototype_marin	1m 47s
placeholder_sandag	2h 35m 40s
prototype_mtc_extended	1h 24m 8s
prototype_sandag_xborder	7m 2s
develop-docbuild	0s
	8h 48m 33s

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