LLD: use {#MACROS} as "IPMI sensor" value for "IPMI agent"

Hi!

It seems user can not use Low Level Discovery macros for "IPMI agent" ("IPMI sensor" value) in item prototype.

I have discovery rule, which returns IMPI-sensor names (via corresponding LLD macros, i.e. {#SENSOR_ID}) .

I can use this macros as Item Name, as Item Key but I can not use it as "IMPI sensor" (item calculation error: "sensor or control {#SENSOR_ID}@[192.168.252.206]:623 does not exis").

This feature is must-have for IPMI low-level discovery.

Thank you.