SSA-6383: Refactoring suggested by documenting this test framework

...es/test/test_data/location_files/A001_X1296_Xa93_RAW.json

...test/test_data/location_files/ALMA_CONT_IMG_4d1b66da.json

...test/test_data/location_files/ALMA_CONT_IMG_71595054.json

...rkspaces/test/test_data/location_files/ALMA_IMG_CUBE.json

...orkspaces/test/test_data/products/expected_values_alma.py

...orkspaces/test/test_data/products/expected_values_evla.py

shared/workspaces/test/test_test_data_expected_values.py

shared/workspaces/test/utilities.py