client.job_unittest: Fix unittest broken with 3263bc8

The new utility function to safely remove directories
also has to be stubbed.

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>
client.setup_job_unittest: Fix unittest broken with 3263bc8

The new utility function to safely remove directories
also has to be stubbed.

Signed-off-by: Lucas Meneghel Rodrigues <lmr@redhat.com>