Access to global constants and removing chooser col filtering #1094

Job	Run time
linux-64-py	5m 54s
prototype_mtc	56m 23s
win-64	8m 58s
placeholder_psrc	57m 30s
Expression Profiling Tests	8m 22s
prototype_marin	1m 50s
production_semcog	6m 49s
Standard 2-Zone Example (SANDAG)	35m 53s
placeholder_multiple_zone	10m 41s
prototype_mwcog	58m 39s
Estimation Mode Unit Tests	23m 1s
random_seed_generation_test	3m 17s
prototype_mtc_extended	42m 58s
Estimation Notebooks Test	49m 29s
Standard 1-Zone Example (MTC)	22m 29s
estimation_edb_creation_test	7m 0s
prototype_sandag_xborder	5m 31s
macOS	7m 18s
develop-docbuild	0s
	6h 52m 2s

Provide feedback