Fix permission-find with sizelimit set

If permission-find is fired with an argument and sizelimit set
a message about truncation will be sent along with the result
as the search in post_callback() does general search instead
of having its filter properly set.

https://fedorahosted.org/freeipa/ticket/5640

Reviewed-By: Martin Basti <mbasti@redhat.com>

ipaserver/plugins/permission.py

@@ -1306,6 +1306,13 @@ class permission_find(baseldap.LDAPSearch):
                 filters.append(ldap.make_filter_from_attr('cn',
                                                           options['name'],
                                                           exact=False))
+            index = tuple(self.args).index('criteria')
+            try:
+                term = args[index]
+                filters.append(self.get_term_filter(ldap, term))
+            except IndexError:
+                term = None
+
             attrs_list = list(self.obj.default_attributes)
             attrs_list += list(self.obj.attribute_members)
             if options.get('all'):