Fix unbound variable $f
Fix unbound variable $f

zokusai/openshift-cartridge-newrelic-agent,maroth/openshift-cartridge-newrelic-agent,Microtronic/openshift-cartridge-newrelic-agent,maroth/openshift-cartridge-newrelic-agent,zokusai/openshift-cartridge-newrelic-agent,Microtronic/openshift-cartridge-newrelic-agent