Fix test_iterlen by returning the iterator of dict views.  Problem is that
iteritems and itervalues' previous object were both an iterator *and* and
iterable.  The tests expected an iterator but were given an iterable.

Should the 2to3 conversion for iter(values|items|keys) change the code to
``iter(dict.keys())`` to be more compatible?
diff --git a/Lib/test/test_iterlen.py b/Lib/test/test_iterlen.py
index e9a6a68..8ff1d6b 100644
--- a/Lib/test/test_iterlen.py
+++ b/Lib/test/test_iterlen.py
@@ -139,14 +139,14 @@
 
     def setUp(self):
         d = dict.fromkeys(xrange(n))
-        self.it = d.items()
+        self.it = iter(d.items())
         self.mutate = d.popitem
 
 class TestDictValues(TestTemporarilyImmutable):
 
     def setUp(self):
         d = dict.fromkeys(xrange(n))
-        self.it = d.values()
+        self.it = iter(d.values())
         self.mutate = d.popitem
 
 class TestSet(TestTemporarilyImmutable):