Add a new objectclass, ipaObject, that will add a UUID to many IPA objects

ipaObject is defined as an auxiliary objectclass so it is up to the
plugin author to ensure that the objectclass is included an a UUID generated.
ipaUniqueId is a MUST attribute so if you include the objectclass you must
ensure that the uuid is generated.

This also fixes up some unrelated unit test failures.

ipalib/plugins/user.py

@@ -24,6 +24,7 @@ Users (Identity)
 from ipalib import api, crud, errors
 from ipalib import Command, Object
 from ipalib import Flag, Int, Password, Str
+from ipalib import uuid
 
 # parent DN
 _container_dn = api.env.container_user
@@ -151,6 +152,8 @@ class user_add(crud.Create):
         # fill default group's gidNumber
         entry_attrs['gidnumber'] = group_attrs['gidnumber']
 
+        entry_attrs['ipauniqueid'] = str(uuid.uuid1())
+
         # create user entry
         ldap.add_entry(dn, entry_attrs)