Access to global constants and removing chooser col filtering #1085

Job	Run time
linux-64-py	5m 53s
macOS	8m 54s
win-64	8m 21s
placeholder_psrc	57m 6s
placeholder_multiple_zone	9m 51s
prototype_mtc	57m 10s
prototype_mtc_extended	43m 27s
Standard 2-Zone Example (SANDAG)	36m 35s
random_seed_generation_test	3m 14s
prototype_sandag_xborder	6m 26s
prototype_marin	2m 1s
Standard 1-Zone Example (MTC)	22m 46s
production_semcog	6m 36s
prototype_mwcog	59m 43s
Estimation Notebooks Test	49m 21s
Estimation Mode Unit Tests	24m 44s
estimation_edb_creation_test	7m 16s
develop-docbuild	-1s
Expression Profiling Tests	7m 32s
	6h 56m 55s

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