[PLA-683][external] 2 Minor fixes for importing of PASCAL VOC annotations

[JBWilkie]

Problem

2 issues:

• 1: get_remote_files() was calling fetch_remote_files() with an incorrect filter parameter filenames instead of item_names
• 2: PASCAL VOC annotations could not be imported to dataset items outside of the root folder

Solution

• Fix for problem 1: Updated get_remote_files() so that it passes item_names instead of filenames to fetch_remote_files()
• Fix for problem 2: Added logic to split the filename into remote_path and an updated filename if a remote path is included in the filename

Changelog

• Fixed a misnamed querystring filter parameter in fetch_remote_files()
• Added support for importing PASCAL VOC annotations to dataset items outside of the root folder '/'

[linear]

PLA-683 BUG: 2 issues when importing PASCAL VOC annotations

[saurbhc]

Thank you 🙏