Add IPMI support

Adds IPMI engine to get sensor data or system power/thermal information on
IPMI capable node, improves overall efficiency and maximizes overall usage for
data center.

Implements bp ipmi-support

Change-Id: I77c881fdaf39c69cfa990468110dbbfa1f8df8dd
Signed-off-by: Zhai Edwin <edwin.zhai@intel.com>