Index names consistently set to "alt" for alternatives files #1093

Job	Run time
linux-64-py	6m 2s
Standard 2-Zone Example (SANDAG)	35m 13s
random_seed_generation_test	3m 15s
Standard 1-Zone Example (MTC)	23m 46s
win-64	9m 32s
macOS	8m 31s
prototype_mtc_extended	1h 24m 52s
prototype_mtc	56m 34s
prototype_sandag_xborder	6m 10s
prototype_mwcog	58m 28s
prototype_marin	1m 59s
production_semcog	7m 2s
placeholder_psrc	54m 30s
Estimation Mode Unit Tests	25m 55s
placeholder_multiple_zone	11m 10s
Estimation Notebooks Test	51m 38s
Expression Profiling Tests	8m 16s
estimation_edb_creation_test	6m 57s
develop-docbuild	0s
	7h 39m 50s

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