Py3: Replace six.integer_types with int

In Python 3, six.integer_types is (int,). In most places, the alias can
be simply replaced with int. In other places, it was possible to
simplify the code by unpacking the tuple.

See: https://pagure.io/freeipa/issue/7715
Signed-off-by: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Florence Blanc-Renaud <frenaud@redhat.com>

ipapython/ipaldap.py

@@ -909,8 +909,7 @@ class LDAPClient:
                 return b'TRUE'
             else:
                 return b'FALSE'
-        elif isinstance(val, (unicode, six.integer_types, Decimal, DN,
-                              Principal)):
+        elif isinstance(val, (unicode, int, Decimal, DN, Principal)):
             return six.text_type(val).encode('utf-8')
         elif isinstance(val, DNSName):
             return val.to_text().encode('ascii')