nghttp2 only on Debian Jessie+

tests/includes/pre_Debian.yml

@@ -9,7 +9,10 @@
     - php5-fpm
     - curl
     - fcgiwrap
-    - nghttp2
+
+- name: APT | Install nghttp2
+  apt: pkg=nghttp2 state=present
+  when: ansible_distribution_major_version | version_compare(8, 'ge')
 
 - name: SERVICE | Force start services
   service: name={{ item }} state=started