Cosmetic improvement to verbose pytest output table part 2

[opotowsky]

Right now (with an open PR) we have the following:

I expected that "reason" column to say Parallel tests only and then the table would fit on the page. It instead says Parallel tests only /some/file/path/that's/probably/really/long and now it will NEVER fit on the page.

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From a little testing @john-science did, verbose pytest output on the command line does not replicate this:

$ pytest -v armi/tests/test_mpiFeatures.py

yields:

armi/tests/test_mpiFeatures.py::MpiOperatorTests::test_basicOperatorMPI SKIPPED (Parallel test only)
armi/tests/test_mpiFeatures.py::MpiOperatorTests::test_finalizeInteract SKIPPED (Parallel test only)
armi/tests/test_mpiFeatures.py::MpiOperatorTests::test_primaryCritical SKIPPED (Parallel test only)
armi/tests/test_mpiFeatures.py::MpiOperatorTests::test_primaryException SKIPPED (Parallel test only)
armi/tests/test_mpiFeatures.py::MpiDistributeStateTests::test_compileResults SKIPPED (Parallel test only)
armi/tests/test_mpiFeatures.py::MpiDistributeStateTests::test_distributeInterfaces SKIPPED (Parallel test only)
...