DNS Locations: dnsserver: remove config when replica is removed

Configuration of DNS server should be removed together with any other
information about replica

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

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

ipaserver/install/replication.py

@@ -19,6 +19,7 @@
 
 from __future__ import print_function
 
+import six
 import time
 import datetime
 import sys
@@ -36,6 +37,9 @@ from ipapython.dn import DN
 from ipaplatform import services
 from ipaplatform.paths import paths
 
+if six.PY3:
+    unicode = str
+
 # the default container used by AD for user entries
 WIN_USER_CONTAINER = DN(('cn', 'Users'))
 # the default container used by IPA for user entries
@@ -1293,6 +1297,17 @@ class ReplicationManager(object):
             elif not err:
                 err = e
 
+        # delete DNS server configuration, if any
+        try:
+            api.Command.dnsserver_del(unicode(replica))
+        except errors.NotFound:
+            pass
+        except Exception as e:
+            if not force:
+                raise e
+            elif not err:
+                err = e
+
         try:
             dn = DN(('cn', 'default'), ('ou', 'profile'), self.suffix)
             ret = self.conn.get_entry(dn)