* removed venv-create-py2

* removed PY2 test from Jenkins config

* simplified project tests Jenkins config

* changed default python version to 3 (make targets)

* try upgrading twine

* Revert "try upgrading twine"

This reverts commit d755e88bd887181341f742e7f42743fea01b73f2.

* Revert "changed default python version to 3 (make targets)"

This reverts commit 1ac9ab19b003db220d24e1022ad5860142aa37e1.

* changed default python version to 3 (make targets)

* enabled network on sciencebeam-utils-py3 (disabled on py2)

* removed *-py2 make targets

* updated default image in Jenkinsfile to -py2

* removed sciencebeam-utils-py2 compose config

* removed -py3 and _PY3 suffix