We had a unit test regression in RBTools 2 that was caused by

pkg_resources emitting a deprecation warning on import. This resulted

in the version output not being quite what we expected.
While RBTools 2 is no longer under development, this same issue is

likely going to crop up in the future due to other imports, and it's

best to take care of it now.
We now ignore warnings when we execute rbt for version testing

purposes, using python -W ignore.

Unit tests pass.