Log Message:
py-test: updated to 4.4.1

pytest 4.4.1:
Bug Fixes
* Environment variables are properly restored when using pytester’s testdir \ 
fixture.
* Fix regression with --pdbcls, which stopped working with local modules in 4.0.0.
* Produce a warning when unknown keywords are passed to pytest.param(...).
* Invalidate import caches with monkeypatch.syspath_prepend, which is required \ 
with namespace packages being used.