fix: AMAZON_S3_SUBFOLDER proper use.
fix: AMAZON_S3_SUBFOLDER proper use.

superdesk/liveblog,hlmnrmr/liveblog,superdesk/liveblog,hlmnrmr/liveblog,liveblog/liveblog,liveblog/liveblog,liveblog/liveblog,superdesk/liveblog,superdesk/liveblog,liveblog/liveblog,hlmnrmr/liveblog,liveblog/liveblog,hlmnrmr/liveblog