Index names consistently set to "alt" for alternatives files #1083

Job	Run time
linux-64-py	5m 48s
win-64	8m 46s
Standard 1-Zone Example (MTC)	23m 13s
random_seed_generation_test	3m 6s
Standard 2-Zone Example (SANDAG)	34m 26s
macOS	7m 29s
placeholder_psrc	52m 52s
prototype_mtc	54m 31s
prototype_marin	1m 41s
production_semcog	6m 56s
Estimation Mode Unit Tests	25m 3s
placeholder_multiple_zone	10m 38s
prototype_mtc_extended	1h 24m 14s
prototype_mwcog	57m 19s
prototype_sandag_xborder	5m 55s
estimation_edb_creation_test	6m 50s
Expression Profiling Tests	8m 7s
Estimation Notebooks Test	51m 28s
develop-docbuild	0s
	7h 28m 22s

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