move version numbers to ENV variables
move version numbers to ENV variables

ENV ver for Python

break lines

more version refactor

fix python2 installation

Revert "fix python2 installation"

This reverts commit 5bf8cdfe61fd340ea6d925c41c63ed776e2c1cf5.

felipenoris/math-server-docker,felipenoris/AWSFinance,felipenoris/math-server-docker,felipenoris/AWSFinance