Updates to davisagli-py-3 branch

[ale-rt]

No description provided.

[icemac]

I am not sure what's the intent of the changes but from code level the look okay to me.

[ale-rt]

@davisagli if you are committing to this branch it might have sense to merge this branch into your (the original one I did not want to mess up).

[dataflake]

Most of this branch is no longer needed. I manually merged the minimum changes necessary to make all tests pass on the davisagli-py3 branch. I would like to merge that branch into master this week at the sprint in Halle, all further work can then branch off master again.

[ale-rt]

Thanks! Probably some of the changes are still needed to have Products.CMFCore tests green, but we can't sort this out the next week.
I will not be at the sprint but I will try to be available remotely :)

[dataflake]

Tests are actually all green in CMFCore: zopefoundation/Products.CMFCore#42. That is ready to merge as well.

[ale-rt]

The tests are green because they are using this branch: https://github.com/zopefoundation/Products.CMFCore/pull/42/files#diff-a55fc4e553af13234f26342646b88e19R19 :)

[dataflake]

Closing the pull request, I pulled all I needed from that branch.

[davisagli]

Thanks for sorting that out, @dataflake