[extractor] added LightCNN based extractors, and corresponding unit tests

2 jobs for add-extractors in 6 minutes and 43 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
failed #156220
docker
build_linux_36

00:06:43

71.0%
passed #156221
macosx
build_macosx_36

00:01:48

 
Name Stage Failure
failed
build_linux_36 Build
Removing miniconda/pkgs/zlib-1.2.11-h7b6447c_3/
Removing miniconda/pkgs/zstd-1.3.7-h0b5b093_0/
Removing miniconda/sbin/
Removing miniconda/share/
Removing miniconda/shell/
Removing miniconda/ssl/
Removing miniconda/x86_64-conda_cos6-linux-gnu/
Removing record.txt
ERROR: Job failed: exit code 1