Idviews: fix objectclass violation on idview-add

When the option --domain-resolution-order is used with the command
ipa idview-add, the resulting LDAP object stores the value in
ipadomainresolutionorder attribute.
The issue is that the add command does not add the needed object
class (ipaNameResolutionData) because it is part of
possible_objectclasses but not of object_class.

The fix makes sure to add the objectclass when the option
--domain-resolution-order is used, and adds a non-regression test.

Note that idview-mod does not have any issue as it correctly handles
the addition of missing possible objectclasses.

Fixes:
https://pagure.io/freeipa/issue/7350

Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>

ipaserver/plugins/idviews.py

@@ -22,10 +22,11 @@ import re
 import six
 
 from .baseldap import (LDAPQuery, LDAPObject, LDAPCreate,
-                                     LDAPDelete, LDAPUpdate, LDAPSearch,
-                                     LDAPAddAttributeViaOption,
-                                     LDAPRemoveAttributeViaOption,
-                                     LDAPRetrieve, global_output_params)
+                       LDAPDelete, LDAPUpdate, LDAPSearch,
+                       LDAPAddAttributeViaOption,
+                       LDAPRemoveAttributeViaOption,
+                       LDAPRetrieve, global_output_params,
+                       add_missing_object_class)
 from .hostgroup import get_complete_hostgroup_member_list
 from ipalib import (
     api, Str, Int, Flag, _, ngettext, errors, output
@@ -173,6 +174,12 @@ class idview_add(LDAPCreate):
     def pre_callback(self, ldap, dn, entry_attrs, attrs_list, *keys, **options):
         self.api.Object.config.validate_domain_resolution_order(entry_attrs)
 
+        # The objectclass ipaNameResolutionData may not be present on
+        # the id view. We need to add it if we define a new
+        # value for ipaDomainResolutionOrder
+        if 'ipadomainresolutionorder' in entry_attrs:
+            add_missing_object_class(ldap, u'ipanameresolutiondata', dn,
+                                     entry_attrs, update=False)
         return dn