roles/mariadb: Add no_log to the client configuration

roles/mariadb/tasks/main.yml

@@ -32,6 +32,7 @@
 
 - name: create client configuration for root
   template: src=client.cnf.j2 dest=/root/.my.cnf
+  no_log: true
 
 - name: configure mariadb
   template: src=server.cnf.j2 dest=/etc/mysql/my.cnf