tests: Allow Tracker.dn be an instance of Fuzzy

Some of the IPA LDAP entries are using ipaUniqueID as
the "primary key". To match this UUID based attribute
in assert_deepequal, an instance of Fuzzy class must
be used. This change adds the possibility to assign
the Fuzzy object as the DN for the tracked entry.

The user may need to override the rdn and name
properties for the class using the Fuzzy DN.

Reviewed-By: Lenka Doudova <ldoudova@redhat.com>

ipatests/test_xmlrpc/ldaptracker.py

@@ -11,6 +11,7 @@ import functools
 from ipalib import api, errors
 from ipapython.dn import DN
 from ipapython.version import API_VERSION
+from ipatests.util import Fuzzy
 
 
 class Tracker(object):
@@ -88,8 +89,8 @@ class Tracker(object):
 
     @dn.setter
     def dn(self, value):
-        if not isinstance(value, DN):
-            raise ValueError('The value must be an instance of DN.')
+        if not (isinstance(value, DN) or isinstance(value, Fuzzy)):
+            raise ValueError('The value must be an instance of DN or Fuzzy.')
         self._dn = value
 
     @property