make external layout fixing more efficient

xtreemfs_client/OSDManager.py

@@ -400,8 +400,8 @@ class OSDManager(object):
             for file in files:
                 current_file_path = os.path.join(root, file)
                 copied_file_path = os.path.join(tmp_dir, file)
-                shutil.copy(current_file_path, copied_file_path)
-                os.remove(current_file_path)
+                shutil.move(current_file_path, copied_file_path)
+                # os.remove(current_file_path)
                 shutil.copy(copied_file_path, os.path.split(current_file_path)[0])
                 os.remove(copied_file_path)