added option to enable epel repo

Former-commit-id: 732e5751

roles/extra_packages/tasks/main.yml

@@ -18,7 +18,15 @@
   with_items: "{{ extra_packages }}"
   become: true
   become_user: root
-  when: ansible_os_family == 'RedHat'
+  when: ansible_os_family == 'RedHat' and useEpel is not defined
+  register: result
+
+- name: "Install extra packages with the epel repo enabled"
+  yum: "name={{ item }} exclude={{ excludes|join(',') }} update_cache=yes state=present enablerepo=epel"
+  with_items: "{{ extra_packages }}"
+  become: true
+  become_user: root
+  when: ansible_os_family == 'RedHat' and useEpel is defined
   register: result
 
 - name: "Show yum install output"