Fix: plugin-tests discarding current environment
By default, exec uses the environment of the current process, however,
if `exec.Env` is not `nil`, the environment is discarded:
https://github.com/golang/go/blob/e73f4894949c4ced611881329ff8f37805152585/src/os/exec/exec.go#L57-L60
> If Env is nil, the new process uses the current process's environment.
When adding a new environment variable, prepend the current environment,
to make sure it is not discarded.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
(cherry picked from commit 6c4fbb7738)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
Sebastiaan van Stijn
fc8717799f