renew sliver causes failure "no reason given"

[lnevers@bbn.com]

Attempt to renew a sliver fails with "no reason given":

$ omni.py renewsliver -a eg-sm lnexo  2012-12-11
INFO:omni:Loading config file /home/lnevers/.gcf/omni_config
INFO:omni:Using control framework pg
INFO:omni:Slice urn:publicid:IDN+pgeni.gpolab.bbn.com+slice+lnexo expires on 2012-12-11 00:00:00 UTC
INFO:omni:Renewing Sliver lnexo until 2012-12-11 00:00:00+00:00 (UTC)
INFO:omni:Substituting AM nickname eg-sm with URL https://geni.renci.org:11443/orca/xmlrpc, URN unspecified_AM_URN
WARNING:omni:Failed to renew sliver urn:publicid:IDN+pgeni.gpolab.bbn.com+slice+lnexo on unspecified_AM_URN (https://geni.renci.org:11443/orca/xmlrpc) (got result 'False') (no reason given)
INFO:omni: ------------------------------------------------------------
INFO:omni: Completed renewsliver:

  Options as run:
		aggregate: ['eg-sm']
		framework: pg

  Args: renewsliver lnexo 2012-12-11

  Result Summary: Slice urn:publicid:IDN+pgeni.gpolab.bbn.com+slice+lnexo expires on 2012-12-11 00:00:00 UTC
Failed to renew sliver urn:publicid:IDN+pgeni.gpolab.bbn.com+slice+lnexo on unspecified_AM_URN (https://geni.renci.org:11443/orca/xmlrpc) (got result 'False') (no reason given) 
INFO:omni: ============================================================

[lnevers@bbn.com]

This problem is being tracked in ticket #59 (renewing a sliver does not change "orca_expires"). Closing.