[TST] Use unicode in tests.

Tests/search.py

@@ -1,3 +1,5 @@
+from __future__ import unicode_literals
+
 import sys,pprint,ldap
 
 from ldap.ldapobject import LDAPObject

Tests/slapd.py

@@ -4,6 +4,8 @@ Utilities for starting up a test slapd server
 and talking to it with ldapsearch/ldapadd.
 """
 
+from __future__ import unicode_literals
+
 import sys, os, socket, time, subprocess, logging
 
 _log = logging.getLogger("slapd")

Tests/t_cext.py

@@ -1,3 +1,5 @@
+from __future__ import unicode_literals
+
 
 import unittest, slapd
 import _ldap

Tests/t_ldapurl.py

@@ -1,5 +1,7 @@
 # -*- coding: utf-8 -*-
 
+from __future__ import unicode_literals
+
 import ldap, unittest
 from ldap.compat import quote
 

Tests/t_search.py

@@ -1,3 +1,5 @@
+from __future__ import unicode_literals
+
 import ldap, unittest
 import slapd