Add py34 to envlist
Add py34 to envlist

Since we already added py34 job to Sahara, it would be useful
to add py34 to envlist in tox.ini

Change-Id: I3ddcf96045bbe1a2d376831fc2e6fff2e94cedc3

zhangjunli177/sahara,crobby/sahara,ekasitk/sahara,crobby/sahara,openstack/sahara,ekasitk/sahara,zhangjunli177/sahara,openstack/sahara,ekasitk/sahara,egafford/sahara,tellesnobrega/sahara,tellesnobrega/sahara,crobby/sahara,zhangjunli177/sahara,egafford/sahara