Fix typo in storm_env.ini

pytyon -> python, and tense agreement.

Least-significant PR in the world, is it even worth opening a JIRA issue for it?
Merge branch 'patch-2' of https://github.com/apetresc/incubator-storm into STORM-372

STORM-372: Typo in storm_env.ini
Added STORM-372 to Changelog