REFACTOR: Rewrite DS to use RecordConfigV2 #1201

Job	Run time
integration-test-providers	4s
integration-tests (NAMEDOTCOM)	5m 50s
integration-tests (DIGITALOCEAN)	5m 25s
integration-tests (AXFRDDNS_DNSSEC)	2m 18s
integration-tests (NS1)	5m 24s
integration-tests (GCLOUD)	3m 2s
integration-tests (MYTHICBEASTS)	9m 26s
integration-tests (AZURE_DNS)	7m 48s
integration-tests (BIND)	2m 44s
integration-tests (TRANSIP)	6m 53s
integration-tests (ROUTE53)	5m 18s
integration-tests (HEDNS)	9m 43s
integration-tests (CLOUDFLAREAPI)	6m 56s
integration-tests (SAKURACLOUD)	9m 59s
integration-tests (GANDI_V5)	5m 38s
integration-tests (CNR)	7m 58s
integration-tests (AXFRDDNS)	2m 19s
	1h 36m 45s

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