Make sure to compare connection kwargs in storage copy fast-path

This ensures that if storage is on different hosts, then we use the slower but correct code path .

storage/cloud.py

@@ -261,14 +261,30 @@ class _CloudStorage(BaseStorageV2):
     if (self.__class__ == destination.__class__ and
         self._access_key and self._secret_key and
         self._access_key == destination._access_key and
-        self._secret_key == destination._secret_key):
+        self._secret_key == destination._secret_key and
+        self._connect_kwargs == destination._connect_kwargs):
+
+      # Initialize the cloud connection on the destination as well.
+      destination._initialize_cloud_conn()
+
+      # Check the buckets for both the source and destination locations.
+      if self._cloud_bucket is None:
+        logger.error('Cloud bucket not found for location %s; Configuration is probably invalid!',
+                     self._bucket_name)
+        return
+
+      if destination._cloud_bucket is None:
+        logger.error('Cloud bucket not found for location %s; Configuration is probably invalid!',
+                     destination._bucket_name)
+        return
+
+      # Perform the copy.
       logger.debug('Copying file from %s to %s via a direct boto copy', self._cloud_bucket,
                    destination._cloud_bucket)
 
       source_path = self._init_path(path)
       source_key = self._key_class(self._cloud_bucket, source_path)
 
-      destination._initialize_cloud_conn()
       dest_path = destination._init_path(path)
       source_key.copy(destination._cloud_bucket, dest_path)
       return