Put py34 first in the env order of tox
Put py34 first in the env order of tox

To solve the problem of "db type could
not be determined" on py34 we have to run first the py34 env to, then,
run py27. This patch puts py34 first on the tox.ini list of envs to
avoid this problem to happen.

Change-Id: Ieb28867621ba4c3679cc32bb8288342d18f753c2
Closes-bug: #1489059


openstack/python-solumclient,stackforge/python-solumclient,stackforge/python-solumclient