Return default from hash client when using positional argument

When using `HashClient` with `ignore_exc`, `get` would always return
`None` if no server is available and the default is passed as a
positional argument. The other clients return the default
value in this case. An earlier fix only had the desired effect when
passing `default` as a keyword argument.

Return the default value so `HashClient` behaves like the other
clients even when using

Fixes another variation of issue pinterest#350

pymemcache/client/hash.py

@@ -356,9 +356,9 @@ def close(self):
     def set(self, key, *args, **kwargs):
         return self._run_cmd('set', key, False, *args, **kwargs)
 
-    def get(self, key, *args, **kwargs):
-        default = kwargs.get('default', None)
-        return self._run_cmd('get', key, default, *args, **kwargs)
+    def get(self, key, default=None, **kwargs):
+        kwargs['default'] = default
+        return self._run_cmd('get', key, default, **kwargs)
 
     def incr(self, key, *args, **kwargs):
         return self._run_cmd('incr', key, False, *args, **kwargs)

pymemcache/test/test_client_hash.py

@@ -259,6 +259,8 @@ def test_no_servers_left_with_commands_return_default_value(self):
         assert result is None
         result = client.get('foo', default='default')
         assert result == 'default'
+        result = client.get('foo', 'default')
+        assert result == 'default'
         result = client.set('foo', 'bar')
         assert result is False
 
@@ -381,7 +383,7 @@ def test_dead_server_comes_back(self, client_patch):
         # Client gets removed because of socket timeout
         assert ("127.0.0.1", 11211) in client._dead_clients
 
-        test_client.get.side_effect = lambda *_: "Some value"
+        test_client.get.side_effect = lambda *_, **_kw: "Some value"
         # Client should be retried and brought back
         assert client.get(b"key") == "Some value"
         assert ("127.0.0.1", 11211) not in client._dead_clients
@@ -400,7 +402,7 @@ def test_failed_is_retried(self, client_patch):
         with pytest.raises(socket.timeout):
             client.get(b"key", noreply=False)
 
-        test_client.get.side_effect = lambda *_: "Some value"
+        test_client.get.side_effect = lambda *_, **_kw: "Some value"
         assert client.get(b"key") == "Some value"
 
         assert client_patch.call_count == 1