backfilling unit tests for create_local_dns_record
backfilling unit tests for create_local_dns_record

[#119418443]

Signed-off-by: Ming Xiao <fde61075b779168f6585a9760a4f9e9e08423562@pivotal.io>

barthy1/bosh,barthy1/bosh,barthy1/bosh,barthy1/bosh