Limit max age of replication changelog

Limit max age of replication changelog to seven days, instead of grow to
unlimited size.

https://fedorahosted.org/freeipa/ticket/5086

Reviewed-By: David Kupka <dkupka@redhat.com>

ipaserver/install/replication.py

@@ -468,6 +468,7 @@ class ReplicationManager(object):
                 'objectclass': ["top", "extensibleobject"],
                 'cn': ["changelog5"],
                 'nsslapd-changelogdir': [os.path.join(dbdir, "cldb")],
+                'nsslapd-changelogmaxage': ['7d'],
             }
         )
         try: