Fix test binaries so tests can run in a deterministic way in isolated environment
Some test are passing by accident or luck, based on local machine $PATH
and binaries on host that run tests. There should be files imitating them (see other foris-controller-*
modules) to enable running tests in isolated environment.
Add fake files to test calling scripts or binaries (blkid, stat, ...) in deterministic and reproducible manner. Commit 0145267b actually made it even less deterministic on different machines.