Add ability to read old and new Serverwiz xml outputs.
Add ability to read old and new Serverwiz xml outputs.

The new Serverwiz format added outer tags for performance
reasons.  It also added attribute groups for accessing
like attributes with one API call.

Change-Id: I6b6c6de8defbc5c0f0c8c7d191836e69ac7bfc98
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/29550
Tested-by: Jenkins Server <8e3f934e4c44875bc48d33da3ea13d93ba9a233f@us.ibm.com>
Reviewed-by: Matt Spinler <c000c989d08c98662d98f15448f11de169feb92d@us.ibm.com>
Tested-by: Jenkins OP Build CI <e610bd72261d3c0a48f1e8ae36832ab00774d426@us.ibm.com>
Tested-by: Jenkins OP HW <0eb0fff262f74a65a832afbcc7b153e391c9a3fd@us.ibm.com>
Tested-by: FSP CI Jenkins <aa9e4d9ac7cd25905e9c0dd36d4150516e73dd86@us.ibm.com>
Reviewed-by: William G. Hoffa <7dd6aa5e78423995d9d7c7ecada5b77ee07f88cc@us.ibm.com>
Reviewed-by: Prachi Gupta <25a72946fc4ec2539bba3cff1fbb2916af6a7649@us.ibm.com>
Reviewed-by: Matthew A. Ploetz <9c4e62337697f225e3360ddd1441dbba069477f9@us.ibm.com>
Reviewed-on: http://ralgit01.raleigh.ibm.com/gerrit1/30201

Over-enthusiastic/hostboot,Over-enthusiastic/hostboot,Over-enthusiastic/hostboot,Over-enthusiastic/hostboot,Over-enthusiastic/hostboot