Merge branch 'addEpelToExtraPackages' into 'master'

Add epel to extra packages

See merge request hpc-team/ansible_cluster_in_a_box!255

roles/extra_packages/README.md

 This role adds all the packages we think are useful but aren't clearly a dependency of some function.
+
+Before calling, you may want to  define the following lists:
+
+extra_packages  #list of yum packages. Or see code on how to it loads an  alternative file  if not defined
+exclude 	#list of packages to exclude
+
+
+Usage:
+  roles:
+  - { role: extra_packages, tags: [ other, extra_packages ] }

roles/extra_packages/tasks/main.yml

@@ -13,12 +13,12 @@
   become: true
   when: ansible_os_family == 'RedHat'
  
-- name: "Install extra packages"
-  yum: "name={{ item }} exclude={{ excludes|join(',') }} update_cache=yes state=present"
+- 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'
+  when: ansible_os_family == 'RedHat' 
   register: result
 
 - name: "Show yum install output"