Add data and test infrastructure for import paths #8
Description
Similar to (and/or reusing) https://github.com/IDAES/devtools/tree/bwcompat#collect-list-of-module-objects-defined-in-package
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Similar to (and/or reusing) https://github.com/IDAES/devtools/tree/bwcompat#collect-list-of-module-objects-defined-in-package