Use unique names Network Domains and VLANs in acceptance tests

[tintoy]

Use the random resource type to add a numeric suffix to the names. Modify verification functions to take account of this.

• [ ] Data sources
  • [ ] ddcloud_networkdomain
  • [ ] ddcloud_vlan
• [ ] Resources
  • [ ] ddcloud_networkdomain
  • [ ] ddcloud_vlan
  • [ ] ddcloud_server
  • [ ] ddcloud_firewall_rule
  • [ ] ddcloud_address_list
  • [ ] ddcloud_port_list
  • [ ] ddcloud_nat
  • [ ] ddcloud_server_anti_affinity
  • [ ] ddcloud_vip_node
  • [ ] ddcloud_vip_pool
  • [ ] ddcloud_vip_pool_member
  • [ ] ddcloud_virtual_listener
  • [ ] ddcloud_ip_address_reservation