GitLab

This is causing us to run out of travis-ci credits, making tests not run
at all.  I deleted the duplicative tests and then disabled two additonal
ones by commenting them out that would be nice to run but I think are
not essential.  In particular, the OSX one eats up a ton of credits.  So
I disabled that.  Maybe we can turn it back on later if we end up well
under the credit budget (or switch to github actions which appears to
have higher limits)

and the unit test servers don't even support it anymore.

Fixed pytest not working with python 2.7.  So turning travis tests back on for that version of python.

incompatibility between python 2.7 and pytest, but only on travis.