rasdaemon: add support to match the machine by system's product name

rasdaemon: add support to match the machine by system's product name

In some cases the motherboard names will change but the mapping won't
across a line of products. This patch adds support for "Product:" to be
specified in the label files instead of Model:.

An example:
	Vendor: Dell Inc.
	  Product: PowerEdge R610
	    DIMM_A1: 0.0.0;     DIMM_A2:  0.0.1;        DIMM_A3:  0.0.2;
	    DIMM_A4: 0.1.0;     DIMM_A5:  0.1.1;        DIMM_A6:  0.1.2;

	    DIMM_B1: 1.0.0;     DIMM_B2:  1.0.1;        DIMM_B3:  1.0.2;
	    DIMM_B4: 1.1.0;     DIMM_B5:  1.1.1;        DIMM_B6:  1.1.2;

Would match all 'PowerEdge R610' machines.

Signed-off-by: Aristeu Rozanski <arozansk@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>