Fixes for GeniCredential::CreateFromSigned: eschew getElementsByTagName(), which would erroneously ignore extraneous elements beyond the expected first one, and could potentially return irrelevant elements from deeper in the hierarchy than we want to look.
Fixes for GeniCredential::CreateFromSigned: eschew getElementsByTagName(),
which would erroneously ignore extraneous elements beyond the expected
first one, and could potentially return irrelevant elements from deeper
in the hierarchy than we want to look.

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