[CODE] add CentOS support to telegraf and cronmails (fix #6)

tasks/cronmails.yml

@@ -2,15 +2,14 @@
 # Server/Cronmails: Setup Mails from Cronjobs (install exim)
 
 # Install and configure exim
-- name: cronmails - Install exim4 as MTA
-  become: yes
-  apt:
-    name: "{{ packages }}"
-    state: present
-  vars:
-    packages:
-      - exim4
-      - mailutils
+- name: cronmails - Install exim4
+  include_tasks: "{{ item }}"
+  with_first_found:
+    - "cronmails-{{ ansible_distribution }}.{{ ansible_distribution_release }}.yml"
+    - "cronmails-{{ ansible_distribution }}.yml"
+    - "cronmails-{{ ansible_os_family }}.yml"
+
+# Configure exim
 - name: cronmails - Create exim4 config folder
   become: yes
   file: