Bring py27 tests back
Bring py27 tests back

Since defaulting to py3 our 2.7 jobs have actually ran against python 3
due to basepython not declared on our 27 evironments. This patch will
change that.

Change-Id: I4d97c0577460949e8636e9f26b1d4b60b109f5d1

openstack/glance,openstack/glance,openstack/glance