Bug 187629: do not refresh a CERTCertificate if the same instance of a cached cert is added to the collection.
Bug 187629: do not refresh a CERTCertificate if the same instance of a
cached cert is added to the collection.

thespooler/nss,thespooler/nss,thespooler/nss,thespooler/nss,thespooler/nss,thespooler/nss,thespooler/nss