Initial sync

ERROR:aiohttp.server:Error handling request
Traceback (most recent call last):
  File "/usr/local/lib/python3.8/site-packages/aiohttp/web_protocol.py", line 418, in start
    resp = await task
  File "/usr/local/lib/python3.8/site-packages/aiohttp/web_app.py", line 458, in _handle
    resp = await handler(request)
  File "/usr/local/lib/python3.8/site-packages/aiohttp/web_middlewares.py", line 119, in impl
    return await handler(request)
  File "/usr/local/lib/python3.8/site-packages/prozorro_sale/auth/__init__.py", line 67, in context_middleware
    return await handler(request)
  File "/usr/local/lib/python3.8/site-packages/prozorro_sale/auth/__init__.py", line 83, in handler
    return await func(request, *args, **kwargs)
  File "/mirror/mongodb_mirror/main.py", line 219, in websocket_handler
    await request.app.mirror.sync_client(protocol_class(ws, addr=request.headers.get('X-FORWARDED-FOR')))
  File "/mirror/mongodb_mirror/main.py", line 54, in sync_client
    timestamp = await self._initial_sync(client)
  File "/mirror/mongodb_mirror/main.py", line 177, in _initial_sync
    collection_filter = {'dateModified': {'$gte': datetime.strptime(init_point, '%Y-%m-%dT%H:%M:%S.%f')}}
  File "/usr/local/lib/python3.8/_strptime.py", line 568, in _strptime_datetime
    tt, fraction, gmtoff_fraction = _strptime(data_string, format)
  File "/usr/local/lib/python3.8/_strptime.py", line 352, in _strptime
    raise ValueError("unconverted data remains: %s" %
ValueError: unconverted data remains: Z