Behave by default just grabs the latest parse_type package as part of
the setup requirement. However, the newest parse_type package (0.4.2)
uses a new convention on how it handles packaging which is not in the
older python versions before 2.7.13. Since we're in python 2.7.12, we
break.

Force requirement to use an older version as a hack to bypass this
issue.
Signed-off-by: NMarbin Tan <mtan@pivotal.io>