Add some UTs to test_records.py
Add some UTs to test_records.py

Change-Id: I7e5f21f5cb084b4393daa013b121dd7e93c5432a

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