"record-list" should be case insensitive

[Hao Chen]

In a newton deployment, we created a domain with two upper letters "TTesting.net.". Then we associate it with a network. If we run record-list using TTesting.net. we can get the right result, but if we run record-list using ttesting.net. We got a "couldn't find resource" error.

Based on https://tools.ietf.org/html/rfc4343 domain name should be case insensitive. And we also verify that in the same environment we can't create another domain with ttesting.net. because of duplicate_domain error. We should fix this record-list problem so "TTesting.net." and "ttesting.net." will return the same result.

honolulu-citron:/opt/openstack # designate --insecure domain-list
+--------------------------------------+---------------+------------+
| id | name | serial |
+--------------------------------------+---------------+------------+
| 2c37cfe4-bd5c-40be-a6e9-35a2321df601 | TTesting.net. | 1478277961 |
+--------------------------------------+---------------+------------+
honolulu-citron:/opt/openstack # neutron --insecure net-update 05644fca-b2f0-40e1-810b-bcc48bcdef1e --dns_domain TTesting.net.

honolulu-citron:/opt/openstack # designate --insecure record-list TTesting.net.
+--------------------------------------+------+---------------+--------------------------------------------------------------------+
| id | type | name | data |
+--------------------------------------+------+---------------+--------------------------------------------------------------------+
| 1be49a57-5872-48c1-9d57-711055a833df | NS | TTesting.net. | ns1-1.example.org. |
| 3c4ddd32-6ec9-4c2d-85a0-48f95263e9b8 | NS | TTesting.net. | ns.foo.com. |
| 43164f1b-fbd3-4bd8-a8a5-d151be26e12e | SOA | TTesting.net. | ns1-1.example.org. me.mydomain.com. 1478277961 3508 600 86400 3600 |
+--------------------------------------+------+---------------+--------------------------------------------------------------------+

honolulu-citron:/opt/openstack # designate --insecure record-list ttesting.net.
ERROR: Could not find resource with name "ttesting.net."

honolulu-citron:/opt/openstack # designate --insecure domain-create --name ttesting.net. --email <email address hidden>
+---------+------------------+
| Field | Value |
+---------+------------------+
| Code | 409 |
| Type | duplicate_domain |
| Message | Duplicate Zone |
+---------+------------------+
ERROR: The requested action did not complete successfully