Python sys tests much longer with added tower testing...

#2406 makes the python system testing much longer. It's still less than an hour but a good fraction of it though. This is something that would help our python development and testing if we make it shorter. The reason for the length is really #2885. So fixing it should resolve this.

I'm also wondering about breaking up python system tests to another set of "long_sys" tests, that maybe we don't run as often? And actually if we ran that test list as part of aux_clm hour long testing would be fine.