Index names consistently set to "alt" for alternatives files #1082

Job	Run time
linux-64-py	5m 52s
Estimation Notebooks Test	51m 48s
win-64	8m 31s
Standard 2-Zone Example (SANDAG)	36m 21s
Standard 1-Zone Example (MTC)	24m 15s
macOS	8m 5s
random_seed_generation_test	3m 20s
prototype_sandag_xborder	6m 47s
prototype_mtc	54m 59s
placeholder_psrc	58m 41s
prototype_mtc_extended	1h 23m 52s
prototype_marin	1m 43s
placeholder_multiple_zone	10m 30s
prototype_mwcog	55m 41s
estimation_edb_creation_test	7m 14s
production_semcog	6m 47s
Estimation Mode Unit Tests	23m 55s
develop-docbuild	0s
Expression Profiling Tests	7m 51s
	7h 36m 12s

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