Revert "Manage DNS zone when checking or deleting site only if domain is created"

This reverts commit fe94731dc2c17f972035bf09cc51ce3d04cc7500.
Revert "Create DNS Zone only when domain is created"

This reverts commit 4df20661b96e14b25a6a393568170ed7b2b3e6d6.
Use authoritative property to define zone creation/deletion
Force DNS service to guess zone w/ new URI in migrate/clone tasks