Add Namespace utility class. (This is already used in the leasedb/cloud backend branch.)

Signed-off-by: Daira Hopwood <daira@jacaranda.org>

src/allmydata/test/test_iputil.py

@@ -5,11 +5,9 @@ from twisted.trial import unittest
 
 from allmydata.util import iputil
 import allmydata.test.common_util as testutil
+from allmydata.util.namespace import Namespace
 
 
-class Namespace:
-    pass
-
 DOTTED_QUAD_RE=re.compile("^[0-9]+\.[0-9]+\.[0-9]+\.[0-9]+$")
 
 MOCK_IPADDR_OUTPUT = """\

src/allmydata/util/namespace.py

@@ -0,0 +1,3 @@
+
+class Namespace(object):
+    pass