Ensure slivers get deleted if something goes wrong with multi-slice test.
Ensure slivers get deleted if something goes wrong with multi-slice test.

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