Tweak core view's rattail config init logic, for tests

tailbone/views/core.py

@@ -41,14 +41,16 @@ class View(object):
 
     def __init__(self, request):
         self.request = request
-        self.enum = self.rattail_config.get_enum()
+        config = self.rattail_config
+        if config:
+            self.enum = config.get_enum()
 
     @property
     def rattail_config(self):
         """
         Reference to the effective Rattail config object.
         """
-        return self.request.rattail_config
+        return getattr(self.request, 'rattail_config', None)
 
     def late_login_user(self):
         """