smtp_auth_relay: new role, use by copr-dist-git-dev for now

roles/smtp-auth-relay/tasks/main.yml

@@ -0,0 +1,25 @@
+---
+- name: install the needed packages
+  package:
+    name:
+      - postfix
+      - cyrus-sasl
+      - cyrus-sasl-plain
+  tags:
+    - smtp_auth_relay
+
+- name: create the password file
+  copy:
+    dest: /etc/postfix/sasl_passwd
+    content: "{{ smtp_auth_relay_host }}  {{ smtp_auth_relay_user }}:{{ smtp_auth_relay_password }}"
+    mode: 0600
+  register: smtp_relay_password_file
+  tags:
+    - smtp_auth_relay
+
+- name: regenerate the password db file
+  shell: postmap /etc/postfix/sasl_passwd
+  when: smtp_relay_password_file.changed
+  notify: restart postfix
+  tags:
+    - smtp_auth_relay