The ipmi meters use resource_ids which make it challenging
to select information for all the sensors of a particular type.
This change adds metadata that identifies the physical node on
which a sensor exists.
There are still remaining issues with the naming of ipmi and
sensor-related meters that will need to be addressed separately.
Closes-Bug: 1377157
Change-Id: Ib53755112e4757aa53ab60079f3c555e21a72b63
3b20fa0852