Fix KeyError due to lazy use of raw_command
Fix KeyError due to lazy use of raw_command

xraw_command is the version intended to be lazily
used, switch to that version to make the SDR code
more robust.

Change-Id: I1e9b799dd21861fa602db6a1d474334e88915c38

stackforge/pyghmi,openstack/pyghmi,openstack/pyghmi