HPE Switches: Power Supply Status
This check monitors the state of power supplies in HPE switches. "maxstate"
is treated as UNKNOWN, "not present", "not plugged" and "permanent failure" as CRIT,
"failed" as WARN and "powered" as OK. The status code 8, which is not documented
in the MIB, appears to mean the device is unplugged, which we treat as CRIT.
The index of the power supply
One service is created for each power supply.