Fedora 26 has reached its EOL on May 29th 2018.

https://lists.fedoraproject.org/archives/list/announce@lists.fedoraproject.org/message/XGG7GYUJN3VDA6HX4KJNFSKSQCGF2FMW/Signed-off-by: NFabiano Fidêncio <fidencio@redhat.com>
Reviewed-by: NErik Skultety <eskultet@redhat.com>