[test][lib] Add duplicate key test

2 jobs from 82_duplicate_key_handling in 20 minutes and 26 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Build
passed #167035
docker-build
build_linux_36

00:14:53

64.0%
passed #167036
macosx
build_macosx_36

00:20:26

64.0%