CC-5821: Airtime Analyzer: Ftp-uploaded folder doesn't get removed from organize

$_FILES does not store the original file path so we were losing the folder name.
Fixed by explicitly passing the full filepath in via the ftp-upload-hook.sh script
Merge branch 'cc-5709-airtime-analyzer' of github.com:sourcefabric/Airtime into cc-5709-airtime-analyzer