zulip_basecamp_mirror: Move some imports after sys.path updates.

integrations/basecamp/zulip_basecamp_mirror

@@ -35,9 +35,6 @@ import sys
 from stderror import write
 import os
 from datetime import datetime, timedelta
-from six.moves.html_parser import HTMLParser
-from typing import Any, Dict
-import six
 
 sys.path.insert(0, os.path.dirname(__file__))
 import zulip_basecamp_config as config
@@ -46,7 +43,9 @@ VERSION = "0.9"
 if config.ZULIP_API_PATH is not None:
     sys.path.append(config.ZULIP_API_PATH)
 import zulip
-
+from six.moves.html_parser import HTMLParser
+from typing import Any, Dict
+import six
 
 client = zulip.Client(
     email=config.ZULIP_USER,