make lua modules (lmod) work on CentOS 7

roles/enable_lmod/tasks/main.yml

 ---
 - include_vars: "{{ ansible_os_family }}.yml"
 
+- name: Install epel-release 
+  yum: name=epel-release-7-5.noarch state=present 
+  sudo: true 
+  when: ansible_distribution == "CentOS" and ansible_distribution_major_version == "7"
+
+- name: Enable epel 
+  command: yum-config-manager --enable epel 
+  sudo: true
+  when: ansible_distribution == "CentOS" and ansible_distribution_major_version == "7"
+
 - name: install lua
   yum: name={{ item }} state=installed
   with_items: