[test] fixed the download of pretrained FASNet (saves CI time)

2 jobs for 18-tests-take-forever-to-run in 29 minutes and 42 seconds (queued for 1 second)
Status Name Job ID Coverage
  Build
passed build_linux_36 #160826
docker

00:29:36

73.0%
passed build_macosx_36 #160827
macosx

00:02:16