Only add the X.509 proxy to the job if we can find one on disk
Only add the X.509 proxy to the job if we can find one on disk

brianhlin/htcondor-ce,brianhlin/htcondor-ce,matyasselmeci/htcondor-ce,matyasselmeci/htcondor-ce,brianhlin/htcondor-ce,matyasselmeci/htcondor-ce