redmine: use .my.cnf for mysql password

redmine/tasks/main.yml

@@ -194,6 +194,7 @@
     option: '{{ item.option }}'
     value: '{{ item.value }}'
   with_items:
+    - { option: 'host', value: "{{ redmine_db_host }}" }
     - { option: 'user', value: "{{ redmine_db_username }}" }
     - { option: 'database', value: "{{ redmine_db_name }}" }
     - { option: 'password', value: '{{ redmine_db_pass }}' }

redmine/templates/database.yml.j2

@@ -1,7 +1,6 @@
 production:
   adapter: mysql2
-  database: {{ redmine_db_name }}
-  host: {{ redmine_db_host }}
-  username: {{ redmine_db_username }}
-  password: "{{ redmine_db_pass }}"
   encoding: utf8
+  username: {{ redmine_db_username }}
+  default_file: /home/{{ redmine_db_username }}/.my.cnf
+  default_group: client