[unit test] fixed tests, removing unecessary image

2 jobs for 3-add-unit-tests in 29 minutes and 11 seconds (queued for 6 seconds)
Status Job ID Name Coverage
  Build
passed #144795
docker
build_linux_27

00:24:28

68.0%
passed #144796
docker
build_linux_36

00:29:10

68.0%