Improved error message returned in subtest_ListResources if AM doesn't support -t option
Improved error message returned in subtest_ListResources if AM doesn't support -t option

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