idempotency fix

Author: smallsam

tasks/setup-Debian.yml

@@ -1,6 +1,6 @@
 ---
 - name: Check if MySQL is already installed.
-  stat: path=/etc/init.d/mysql
+  stat: path=/etc/init.d/{{ mysql_daemon }}
   register: mysql_installed
 
 - name: Update apt cache if MySQL is not yet installed.