Fix to CreateDatasetCreds(); we do not need a credential for a local lease, it goes through normal emulab permission checks.
Fix to CreateDatasetCreds(); we do not need a credential for a local lease,
it goes through normal emulab permission checks.

nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome