Don't check that valid nodes in rspecs have a <sliver_type> tag.
Don't check that valid nodes in rspecs have a <sliver_type> tag.

GENI-NSF/gram,GENI-NSF/gram,plantigrade/geni-tools,tcmitchell/geni-tools,ahelsing/geni-tools,GENI-NSF/gram,plantigrade/geni-tools,tcmitchell/geni-tools,ahelsing/geni-tools