HEAD-1802 remove usage of /opt/smartdc/etc/zoneconfig (imgapi)
HEAD-1802 remove usage of /opt/smartdc/etc/zoneconfig (imgapi)

joyent/sdc-imgapi,joyent/sdc-imgapi,joyent/sdc-imgapi,numericillustration/sdc-imgapi,numericillustration/sdc-imgapi,numericillustration/sdc-imgapi