Fix path in _is_nanoserver function
Fix path in _is_nanoserver function

Signed-off-by: Micu Matei-Marius <ffdce18e3aed9c8a40562979086663cc29b060a9@cloudbasesolutions.com>

micumatei/cloudbase-init-ci,cloudbase/cloudbase-init-ci,stefan-caraiman/cloudbase-init-ci