"create" let me make a slice which was already expired

[nbastin]

{'SLICE_CREATION': <DateTime '20150831T00:14:03' at 7f3ecdd3fb48>,
 'SLICE_DESCRIPTION': None,
 'SLICE_EXPIRATION': <DateTime '20150830T19:13:56' at 7f3ecdd3fb00>,
 'SLICE_EXPIRED': None,
 'SLICE_NAME': 'chtest-1',
 'SLICE_PROJECT_URN': 'urn:publicid:IDN+ch.geni.net+project+vts-infra',
 'SLICE_UID': '60e3e5de-cc27-4971-8f81-2af71eb3899f',
 'SLICE_URN': 'urn:publicid:IDN+ch.geni.net:vts-infra+slice+chtest-1',
 '_GENI_PROJECT_UID': '10c88fc8-9d57-4971-8820-5b14323557f5',
 '_GENI_SLICE_EMAIL': None,
 '_GENI_SLICE_OWNER': '8a447f06-8bd5-4f32-8fd6-1a3528e7fa37'}

[tcmitchell]

Perhaps this case should cause an ARGUMENT_ERROR.

[nbastin]

Lest I facepalm on more ARGUMENT_ERROR, it would be nice if there were either other errors (as filed in another ticket), or more specific messages / sub-errors that came with it.

[tcmitchell]

This now yields an ARGUMENT_ERROR that includes the message "Requested expiration is in the past".