install snapraid copr on non epel7

roles/snapraid/tasks/installation.yml

@@ -4,6 +4,8 @@
     cmd: dnf copr enable pauken/SnapRAID -y
     creates: /etc/yum.repos.d/_copr:copr.fedorainfracloud.org:pauken:SnapRAID.repo
     warn: false
+  when:
+    - ansible_distribution_major_version|int > 7
 
 - name: Install snapraid
   yum: