Added test_ListResources_untrustedCredential.
Added test_ListResources_untrustedCredential.

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