Add CAA record type support

This commit adds the CAA record type in the list of editable record
types of the Designate Dashboard. This fixes existing CAA records being
shown without a record type, and allows users to create and update
CAA records.

Change-Id: I8287f3f8879592b385852c83007d4b46a61a55c7
Signed-off-by: Aggelos Kolaitis <akolaitis@admin.grnet.gr>

designatedashboard/static/designatedashboard/resources/os-designate-recordset/os-designate-recordset.module.js

@@ -47,7 +47,8 @@
         'SSHFP': gettext('SSHFP - SSH Public Key Fingerprint'),
         'TXT': gettext('TXT - Text record'),
         'SOA': gettext('SOA - Start of authority record'),
-        'NS': gettext('NS - Name server')
+        'NS': gettext('NS - Name server'),
+        'CAA': gettext('CAA - Certificate Authority Authorization record'),
       })
     .constant(
       'designatedashboard.resources.os-designate-recordset.editableTypes',
@@ -61,7 +62,8 @@
         "SPF",
         "SRV",
         "SSHFP",
-        "TXT"
+        "TXT",
+        "CAA",
       ])
     .config(config)
     .run(run);