[common] Make the "status legend" explicit

Having characters explained in a logged string does
not make understanding the code easy.
4 jobs for 67_add_version_of_asset_to_data_sent in 4 minutes and 4 seconds (queued for 7 seconds)
Status Job ID Name Coverage
  Build
passed #195103
docker-build
build_linux_36

00:02:57

55.0%
passed #195104
docker-build
build_linux_37

00:02:55

55.0%
passed #195101
macosx
build_macosx_36

00:04:04

55.0%
passed #195102
macosx
build_macosx_37

00:03:53

55.0%