hardware/hpacucli.py: Avoid PDs not being detected
hardware/hpacucli.py: Avoid PDs not being detected

While parsing the physical drives, the output of some versions of ssacli can report strings in various cases (upper/lower).
This patch makes the output in lower case to improve the matching.

Signed-off-by: Erwan Velu <8e1192e1897158b1024f93d543c3ef91420da2e0@criteo.com>

enovance/hardware,redhat-cip/hardware