Make ipa-replica-manage del actually remove all replication agreements

The previous code was removing only one agreement, leaving all other in place.
This would leave dangling replication agreements once the replica is
uninstalled.

Fixes: https://fedorahosted.org/freeipa/ticket/624

ipaserver/install/replication.py

@@ -537,8 +537,10 @@ class ReplicationManager:
         # allow connections using two different CA certs
         other_conn = ipaldap.IPAdmin(other_hostname, port=oth_port, cacert=oth_cacert)
         try:
-            # For now we always require a password to set up new replica
-            other_conn.do_simple_bind(binddn=oth_binddn, bindpw=oth_bindpw)
+            if oth_bindpw:
+                other_conn.do_simple_bind(binddn=oth_binddn, bindpw=oth_bindpw)
+            else:
+                other_conn.sasl_interactive_bind_s('', SASL_AUTH)
         except Exception, e:
             if iswinsync:
                 logging.info("Could not validate connection to remote server %s:%d - continuing" %