Update setup.cfg 0.2.0
Update setup.cfg 0.2.0

We updated stable/liberty to 0.1.0 and dhellmann gave the advice
that we should change master to 0.2.0 to provide room for
version increments in case we don't reach 1.0.0 in Mitaka.
This will help with dependency management, assuming the late
change to 0.1.0 on stable/liberty doesn't cause issues.

Change-Id: Ibb166362faaab8c1496e74b72d640c3d2cd50339

openstack/searchlight,openstack/searchlight,openstack/searchlight