Merge branch 'tf-arcface' into 'master'

Fix LFW database

See merge request !103
4 jobs for mxnet-demanding in 44 minutes and 46 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Build
passed #224877
docker
build_linux_37

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passed #224878
docker
build_linux_38

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passed #224875
intel macos
build_macos_intel_37

00:14:07

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passed #224876
intel macos
build_macos_intel_38

00:14:02

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