add ok flag to the MockResponse object in order to be compatible with the AWS code, which examines this flag in a callback.

tests/test_etcd.py

@@ -12,6 +12,7 @@ class MockResponse:
     def __init__(self):
         self.status_code = 200
         self.content = '{}'
+        self.ok = True
 
     def json(self):
         return json.loads(self.content)
@@ -34,6 +35,9 @@ def requests_get(url, **kwargs):
         response.status_code = 404
     elif url.startswith('http://noleader'):
         response.content = '{"action":"get","node":{"key":"/service/batman5","dir":true,"nodes":[{"key":"/service/batman5/initialize","value":"postgresql0","modifiedIndex":1582,"createdIndex":1582},{"key":"/service/batman5/leader","value":"postgresql1","expiration":"2015-05-15T09:11:00.037397538Z","ttl":21,"modifiedIndex":20728,"createdIndex":20434},{"key":"/service/batman5/optime","dir":true,"nodes":[{"key":"/service/batman5/optime/leader","value":"2164261704","modifiedIndex":20729,"createdIndex":20729}],"modifiedIndex":20437,"createdIndex":20437},{"key":"/service/batman5/members","dir":true,"nodes":[{"key":"/service/batman5/members/postgresql0","value":"postgres://replicator:[email protected]:5433/postgres","expiration":"2015-05-15T09:11:09.611860899Z","ttl":30,"modifiedIndex":20730,"createdIndex":20730}],"modifiedIndex":1581,"createdIndex":1581}],"modifiedIndex":1581,"createdIndex":1581}}'
+    else:
+        response.status_code = 404
+        response.ok = False
     return response