Fix the busted 'aqlegacy_ftest' doctests, by ensuring that the dummy Implicit...

Fix the busted 'aqlegacy_ftest' doctests, by ensuring that the dummy Implicit view base class doesn't acquire 'index_html'.

lib/python/Products/Five/browser/tests/aqlegacy.py

@@ -71,6 +71,7 @@ class ExplicitWithTemplate(Acquisition.Explicit):
 
 class Implicit(Acquisition.Implicit):
 
+    index_html = None  # we don't want to acquire this!
     def render(self):
         return 'Implicit'