Group and unify ipmi configurations

This patch will simplify/unify the ipmi configurations of both ipmi
drivers. Both will share the same 'ipmi' group of configurations just
like the share the same ipmi_ namespace for driver_info.

Also, configurations that weren't being used anywhere were removed from
the code, they can be reintroduced once the functionally gets implemented.

Change-Id: I5f068fe0598fb41dde20f981bc07d8982a6c66ab
Regenerate the sample config file

Regenerate the sample config file

Change-Id: I89da43470a349ccc632a179a826127f7b9456e7e
Merge "Group and unify ipmi configurations"
Merge "Regenerate the sample config file"