Do not require UUID in credentials; only PG credentials have this, and we will not try to store a foreign credential anyway. But added a check in Store() anyway.
Do not require UUID in credentials; only PG credentials have this, and
we will not try to store a foreign credential anyway. But added a
check in Store() anyway.

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