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: Iff88d06033f998d5e1ab84cac00e40bf516cd6b3
Closes-bug: #1489059

openstack/designate-dashboard,openstack/designate-dashboard,openstack/designate-dashboard