Fix swift-dispersion-populate bug when using SimpleClient class

Commit 7fcbbebb changed the internal client a little bit and removed the
class variable self.attempts in SimpleClient. This is currently still
needed in swift-dispersion-populate to track the number of retries, thus
re-adding it again.

Closes-Bug: 1351323
Change-Id: I98ba6441607158b34708b2dbb2d1a63788681d63

swift/common/internal_client.py

@@ -728,6 +728,7 @@ class SimpleClient(object):
                  max_backoff=5, retries=5):
         self.url = url
         self.token = token
+        self.attempts = 0  # needed in swif-dispersion-populate
         self.starting_backoff = starting_backoff
         self.max_backoff = max_backoff
         self.retries = retries
@@ -796,14 +797,14 @@ class SimpleClient(object):
 
     def retry_request(self, method, **kwargs):
         retries = kwargs.pop('retries', self.retries)
-        attempts = 0
+        self.attempts = 0
         backoff = self.starting_backoff
-        while attempts <= retries:
-            attempts += 1
+        while self.attempts <= retries:
+            self.attempts += 1
             try:
                 return self.base_request(method, **kwargs)
             except (socket.error, httplib.HTTPException, urllib2.URLError):
-                if attempts > retries:
+                if self.attempts > retries:
                     raise
             sleep(backoff)
             backoff = min(backoff * 2, self.max_backoff)

test/unit/common/test_internal_client.py

@@ -1211,6 +1211,7 @@ class TestSimpleClient(unittest.TestCase):
         request.assert_called_with('http://127.0.0.1?format=json', data=None,
                                    headers={'X-Auth-Token': 'token'})
         self.assertEqual([None, None], retval)
+        self.assertEqual(sc.attempts, 2)
 
     @mock.patch('eventlet.green.urllib2.urlopen')
     def test_get_with_retries_param(self, mock_urlopen):