nmci.tests: fix `echo -n` calls + import of `systemd`
echo -n is not working in pure sh, (except distros where sh == bash). Use printf instead.
Detect pytest env correctly for failed systemd import.
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echo -n is not working in pure sh, (except distros where sh == bash). Use printf instead.
Detect pytest env correctly for failed systemd import.
@Runtests:pass