[pgjdbc/pgjdbc] 5aa1cd: packaging: update Fedora's CI

  Branch: refs/heads/fedora-ci-update
  Home:   https://github.com/pgjdbc/pgjdbc
  Commit: 5aa1cd8cfd9a65b5689a35da2835dfc89d5fa1cf
      https://github.com/pgjdbc/pgjdbc/commit/5aa1cd8cfd9a65b5689a35da2835dfc89d5fa1cf
  Author: Pavel Raiskup <praiskup@redhat.com>
  Date:   2018-01-19 (Fri, 19 Jan 2018)

  Changed paths:
    M packaging/rpm/.srpmconfig
    R packaging/rpm/.srpmgen
    M packaging/rpm/fedora-image/Dockerfile
    M packaging/rpm/fedora-image/copr-ci-git
    M packaging/rpm/postgresql-jdbc.spec.tpl
    M packaging/rpm_ci

  Log Message:
  -----------
  packaging: update Fedora's CI

* Update Dockerfile to Fedora 27
* spec template synced with Fedora Rawhide