Some classes not define __ne__() built-in function

Some classes defines __eq__() built-in function, but does
not define __ne__() built-in function, so self.assertEqual works
but self.assertNotEqual does not work at all in this test case in
python2. This patch fixes it.

Change-Id: I3e4f213081268bad44583a63a84795d39094117f
Closes-Bug: #1586268

taskflow/engines/worker_based/types.py

@@ -67,6 +67,9 @@ class TopicWorker(object):
         else:
             return other.identity == self.identity
 
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
     def __repr__(self):
         r = reflection.get_class_name(self, fully_qualified=False)
         if self.identity is not self._NO_IDENTITY:

taskflow/jobs/backends/impl_redis.py

@@ -156,6 +156,9 @@ class RedisJob(base.Job):
         return ((self.board.listings_key, self.priority, self.sequence) ==
                 (other.board.listings_key, other.priority, other.sequence))
 
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
     def __hash__(self):
         return hash((self.board.listings_key, self.priority, self.sequence))
 

taskflow/jobs/backends/impl_zookeeper.py

@@ -201,6 +201,9 @@ class ZookeeperJob(base.Job):
         return ((self.root, self.sequence, self.priority) ==
                 (other.root, other.sequence, other.priority))
 
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
     def __hash__(self):
         return hash(self.path)
 

taskflow/storage.py

@@ -231,6 +231,9 @@ class _Provider(object):
     def __eq__(self, other):
         return (self.name, self.index) == (other.name, other.index)
 
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
 
 def _item_from(container, index):
     """Attempts to fetch a index/key from a given container."""

taskflow/tests/utils.py

@@ -375,6 +375,9 @@ class FailureMatcher(object):
     def __eq__(self, other):
         return self._failure.matches(other)
 
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
 
 class OneReturnRetry(retry.AlwaysRevert):
 

taskflow/types/notifier.py

@@ -123,6 +123,9 @@ class Listener(object):
         else:
             return NotImplemented
 
+    def __ne__(self, other):
+        return not self.__eq__(other)
+
 
 class Notifier(object):
     """A notification (`pub/sub`_ *like*) helper class.