OSSStorageDriver upload_object & download_object_via_stream Issue

在使用libcloud调用aliyun oss时遇到以下两个问题：
1. upload_object: libcloud.common.types.InvalidCredsError: b'\n\n NonStandardHostForbidden\n Your host is invalid. Please use Open Storage Service standard host.\n 60420052D987C1303869C56D\n oss.aliyuncs.com\n\n'
查明原因是因为在OSSStorageDriver调用upload_object时没有将传入Container对象传递到OSSConnection的request方法，导致调用OSS api的时候host设置为默认的oss.aliyun.com 而不是 regionxxx.oss.aliyun.com。
2. download_object_via_stream:
没有实现流式下载的方法，和download_object一样的逻辑。

Start with OSSStorageDriver.upload_object and OSSConnection.request, checking how the Container object is passed and how the request host is selected. Compare download_object_via_stream with download_object; done means the upload uses the container's regional host and streaming download follows the existing download logic.

Written by the indexing model from the issue text.