add fedora 23 for all the crazies who already want it
add fedora 23 for all the crazies who already want it

Signed-off-by: Jessica Frazelle <e0d1a862d8f31af605ecef8c92857b8938ba622e@docker.com>
(cherry picked from commit 45788bb62d6dcdc5b429b5ba10216d2af0402119)

solanolabs/docker,solanolabs/docker,solanolabs/docker