add f26_only jenkins var and install python2/3-koji for pyrpkg

inventory/group_vars/jenkins-slave

@@ -267,17 +267,6 @@ el7_only:
 - python-pygit2     # Required by pagure
 - python-pygments-markdown-lexer  # Required by fedora-hubs (ticket #5425)
 
-# Packages only available/needed in f24+
-f24_only:
-- python2-systemd
-- python2-requests-kerberos
-- python2-jinja2
-- devscripts-minimal # Required by FedoraReview
-- python26
-- python33
-- python34
-- python36
-
 f25_only:
 - python3-tox
 - python26
@@ -285,3 +274,7 @@ f25_only:
 - python34
 - python36
 - swig                # required for coco
+
+f26_only:
+- python2-koji        # Needed for pyrpkg
+- python3-koji        # Needed for pyrpkg

roles/jenkins/slave/tasks/main.yml

@@ -52,10 +52,10 @@
   - jenkins/slave
   - packages
 
-- name: install f24 specific slave packages
+- name: install f26 specific slave packages
   dnf: name={{ item }} state=present
-  with_items: "{{ f24_only }}"
-  when: ansible_distribution_major_version|int == 24
+  with_items: "{{ f26_only }}"
+  when: ansible_distribution_major_version|int == 26
   tags:
   - jenkins
   - jenkins/slave