ipaserver/dcerpc: store forest topology as a blob in ipasam

winbindd expects forest topology information blob to find out child
domains. We should store it in LDAP and let ipasam to retrieve it.
In fact, ipasam already supports updating and loading this information
but during 'ipa trust-fetch-domains' we didn't provide it.

Make sure the blob is preserved after it was retrieved and also updated
when we fetch forest topology information.

Fixes: https://pagure.io/freeipa/issue/8576
Signed-off-by: Alexander Bokovoy <abokovoy@redhat.com>
Reviewed-By: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Rob Crittenden <rcritten@redhat.com>

ipaserver/plugins/trust.py

@@ -1744,6 +1744,9 @@ def add_new_domains_from_trust(myapi, trustinstance, trust_entry,
         tlns = entry.get('ipantadditionalsuffixes', [])
         tlns.extend(x for x in suffixes if x not in tlns)
         entry['ipantadditionalsuffixes'] = tlns
+        ftidata = domains.get('ftinfo_data', None)
+        if ftidata is not None:
+            entry['ipanttrustforesttrustinfo'] = [ftidata]
         ldap.update_entry(entry)
     except errors.EmptyModlist:
         pass