HTCONDOR-1096 Remove string copy in KeyCache::expire()
HTCONDOR-1096 Remove string copy in KeyCache::expire()

htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor