[test][bcp] Typo and code fixes

6 jobs for 90_subprocess_with_different_environment in 40 minutes and 42 seconds (queued for 2 seconds)
Status Job ID Name Coverage
  Build
passed #175995
docker-build
build_linux_36

00:16:15

65.0%
passed #176005
docker-build
build_linux_37

00:15:32

65.0%
passed #176006
macosx
build_macosx_36

00:16:17

64.0%
passed #175994
macosx
build_macosx_37

00:23:58

64.0%
failed #175996
docker-build
build_linux_37

00:15:30

65.0%
failed #175993
macosx
build_macosx_36

00:23:42

64.0%