Limit ES results count to 10000

ES requires using their scroll API to get more than 10,000 results in a single query.

arkindex/project/tests/__init__.py

@@ -57,6 +57,7 @@ class RedisMockMixin(object):
     def tearDown(self):
         for p in self.patches:
             p.stop()
+        self.messages.stop()
         self.redis.flushall()