mwaxmonsky

### Issue Type Code Clean-up, Infrastructure Update, Externals Update ### Issue Description The current implementation of the vertical diffusion solver exposes the LU-decomposition methods/structures and setup directly to user. Minimizing...

Testing refactor

11

Refactoring of testing infrastructure Changes include: - Refactored python tests to leverage `unittest` framework. - Replaced shell tests with equivalent wrapper from Python. - Reduces value duplication from fortran/shell/python files...

## Description As discovered in #601, xmllint is always being checked and run if found. This creates an implicit dependency on xmllint that shouldn't be required for all runs of...