Tests are run with command : make test in a build directory.
Python tests are packaged in a test module of parmepy
Python tests are either searched automaticaly in test_*.py sub-modules of parmepy.test or extracted from docstrings in specified files in main_unit_test.py.

Old tests (in tests module) will be deleted.
Need fix fortran unit tests.

parmepy get back pure python solver workflow. (Need pure python code for advection and remeshing. Need GPU solver.)