Fix broken UTs in test_coordination for py34
Fix broken UTs in test_coordination for py34

1. changes range(x,y) to list(range(x,y))
2. converts str to byte types

Partially-Implements: blueprint designate-py3

Change-Id: I196f232b471208df92583542dcc38d3a81366b3a

tonyli71/designate,tonyli71/designate,muraliselva10/designate,ramsateesh/designate,cneill/designate-testing,muraliselva10/designate,ionrock/designate,openstack/designate,ramsateesh/designate,grahamhayes/designate,muraliselva10/designate,tonyli71/designate,cneill/designate-testing,openstack/designate,cneill/designate-testing,ionrock/designate,grahamhayes/designate,openstack/designate,ramsateesh/designate,grahamhayes/designate,ionrock/designate