auth_log tests: Allow the remote address to be None

Allow self.remoteAddress to be None, remote address filtering is not
required for the winbind auth logging tests.

Signed-off-by: Gary Lockyer <gary@catalyst.net.nz>
Reviewed-by: Andrew Bartlett <abartlet@samba.org>

python/samba/tests/auth_log_base.py

@@ -77,6 +77,9 @@ class AuthLogTestBase(samba.tests.TestCase):
             return False
 
         def isRemote(message):
+            if self.remoteAddress is None:
+                return True
+
             remote = None
             if message["type"] == "Authorization":
                 remote = message["Authorization"]["remoteAddress"]