cardiff: Removing false-positive IPMI splits
cardiff: Removing false-positive IPMI splits

While reading some real case IPMI SDR reports, I found that some FAN,
temperature or network information like mac addr or ip addr were
creating false sub groups.

This patch does remove some known pattern that are pretty useless to
create similar groups of hosts.

rdo-management/cardiff,DirectXMan12/cardiff