updated openflow rspec to support links
updated openflow rspec to support links

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