Added --orca-slice-id option.
Added --orca-slice-id option.

For temporary compatibility with ORCA, pass the slice id instead of
the slice name to sliverstatus, deletesliver, renewsliver and
shutdown. When ORCA honors the slice name this option should be
removed.

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