Fix output of hpacucli when no info available
Fix output of hpacucli when no info available

If no information are available from hpacucli for some reason,
the detect function should return an empty list and not a boolean
to prevent issues when parsing the main list.

See issue [1] for more info.

[1] https://bugs.launchpad.net/tripleo/+bug/1900158

enovance/hardware,redhat-cip/hardware