Tests: Host tracker does not recognize 'ipakrboktoauthasdelegate' attribute

Due to [1] being implemented, retrieve and search tests with --all option
specified fail due to extra attribute.

[1] https://fedorahosted.org/freeipa/ticket/5764

Ticket: https://fedorahosted.org/freeipa/ticket/6240
Reviewed-By: Ganna Kaihorodova <gkaihoro@redhat.com>

ipatests/test_xmlrpc/tracker/host_plugin.py

@@ -40,7 +40,7 @@ class HostTracker(KerberosAliasMixin, Tracker):
     retrieve_all_keys = retrieve_keys | {
         u'cn', u'ipakrbokasdelegate', u'ipakrbrequirespreauth', u'ipauniqueid',
         u'krbcanonicalname', u'managing_host', u'objectclass',
-        u'serverhostname'}
+        u'serverhostname', u'ipakrboktoauthasdelegate'}
     create_keys = retrieve_keys | {'objectclass', 'ipauniqueid',
                                    'randompassword'}
     update_keys = retrieve_keys - {'dn'}
@@ -112,6 +112,7 @@ class HostTracker(KerberosAliasMixin, Tracker):
             ipakrbrequirespreauth=True,
             managing_host=[self.fqdn],
             serverhostname=[self.shortname],
+            ipakrboktoauthasdelegate=False,
         )
         self.exists = True