Add LDAPEntry method generate_modlist.

Use LDAPEntry.generate_modlist instead of LDAPClient._generate_modlist and
remove LDAPClient._generate_modlist.

https://fedorahosted.org/freeipa/ticket/3488

ipaserver/install/ldapupdate.py

@@ -718,7 +718,7 @@ class LDAPUpdate:
         else:
             # Update LDAP
             try:
-                changes = self.conn._generate_modlist(entry.dn, entry)
+                changes = entry.generate_modlist()
                 if len(changes) >= 1:
                     updated = True
                 safe_changes = []

ipaserver/install/schemaupdate.py

@@ -114,7 +114,7 @@ def update_schema(schema_files, ldapi=False, dm_password=None, live_run=True):
 
     # FIXME: We should have a better way to display the modlist,
     # for now display raw output of our internal routine
-    modlist = conn._generate_modlist(schema_entry.dn, schema_entry)
+    modlist = schema_entry.generate_modlist()
     log.debug("Complete schema modlist:\n%s", pprint.pformat(modlist))
 
     if modified and live_run: