Merge branch 'repo' into 'master'

Update repo to 7.6

See merge request hpc-team/ansible_cluster_in_a_box!245

roles/config_repos/files/epel.repo

+# Place this file in your /etc/yum.repos.d/ directory
+
+[epel]
+name=Extra Packages for Enterprise Linux 7 - $basearch
+baseurl=https://consistency0/epel/$releasever/$basearch/
+enabled=0
+gpgcheck=0
+sslverify=false

roles/config_repos/tasks/main.yml

@@ -35,13 +35,14 @@
   with_items:
   - monashhpc_base.repo
   - monashhpc_others.repo
+  - epel.repo
 
 - name: get enabled repos
 #shell: yum repolist | grep -v "repo id" | grep -v "Loaded plugins" | head -n -1 | cut -f 1 -d '/' | sed -s 's/\!//'
   shell: yum repolist all | grep enabled | cut -f 1 -d '/' | sed -s 's/\!//'
   register: repolist
   check_mode: no
-  args: 
+  args:
     warn: False
 
 - name: disable unwanted repos