Add support of new options in dnsconfig

dnsconfig was extended of new attributes, so reflecting it in UI.

New attributes:
  * idnsForwardPolicy
  * idnsAllowSyncPTR
  * idnsZoneRefresh

 https://fedorahosted.org/freeipa/ticket/2489

install/ui/dns.js

@@ -42,11 +42,22 @@ IPA.dns.config_entity = function(spec) {
                     name: 'options',
                     label: IPA.messages.objects.dnsconfig.options,
                     fields: [
+                        {
+                            type: 'checkbox',
+                            name: 'idnsallowsyncptr'
+                        },
                         {
                             type: 'multivalued',
                             name: 'idnsforwarders',
                             validators: [IPA.ip_address_validator()]
-                        }
+                        },
+                        {
+                            type: 'checkboxes',
+                            name: 'idnsforwardpolicy',
+                            mutex: true,
+                            options: IPA.create_options(['only', 'first'])
+                        },
+                        'idnszonerefresh'
                     ]
                 }
             ],

install/ui/test/data/dnsconfig_mod.json

@@ -17,9 +17,18 @@
             "cn": [
                 "dns"
             ],
+            "idnsallowsyncptr": [
+                "FALSE"
+            ],
             "idnsforwarders": [
                 "2001:beef::1"
             ],
+            "idnsforwardpolicy": [
+                "first"
+            ],
+            "idnszonerefresh": [
+                "20"
+            ],
             "objectclass": [
                 "idnsConfigObject",
                 "nsContainer",

install/ui/test/data/dnsconfig_show.json

@@ -18,9 +18,18 @@
                 "dns"
             ],
             "dn": "cn=dns,dc=dev,dc=example,dc=com",
+            "idnsallowsyncptr": [
+                "FALSE"
+            ],
             "idnsforwarders": [
                 "2001:beef::1"
             ],
+            "idnsforwardpolicy": [
+                "first"
+            ],
+            "idnszonerefresh": [
+                "20"
+            ],
             "objectclass": [
                 "idnsConfigObject",
                 "nsContainer",