Revert ".travis.yml: boto setting copied from moto cfg"
Revert ".travis.yml: boto setting copied from moto cfg"

This reverts commit 126d9fcb1aca46f8f6ae916220451e0b4da1c93c.

dimitri-yatsenko/datajoint-python,eywalker/datajoint-python,datajoint/datajoint-python,fabiansinz/datajoint-python