DNS Locations: server-mod: add automatic records update

For any location or server weight change is required to update records

https://fedorahosted.org/freeipa/ticket/2008

Reviewed-By: Petr Spacek <pspacek@redhat.com>
Reviewed-By: Jan Cholasta <jcholast@redhat.com>

ipalib/messages.py

@@ -418,6 +418,16 @@ class DNSUpdateNotIPAManagedZone(PublicMessage):
     )
 
 
+class AutomaticDNSRecordsUpdateFailed(PublicMessage):
+    errno = 13024
+    type = "warning"
+    format = _(
+        "Automatic update of DNS system records failed. "
+        "Please re-run update of system records manually to get list of "
+        "missing records."
+    )
+
+
 def iter_messages(variables, base):
     """Return a tuple with all subclasses
     """