[config] correct handle of the --force option

Status Job ID Name Coverage
  Build
passed #173827
docker
build_linux_36

00:06:02

69.0%
passed #173828
docker
build_linux_37

00:06:00

69.0%
passed #173825
macosx
build_macosx_36

00:05:24

70.0%
passed #173826
macosx
build_macosx_37

00:05:21

70.0%