add clean of mysql folder when new install

tasks/setup-Archlinux.yml

@@ -6,6 +6,10 @@
   pacman: "name={{ mysql_packages }} state=present"
   register: arch_mysql_install_packages
 
+- name: clean /var/lib/mysql if new instaled
+  file: path=/var/lib/mysql state=absent
+  when: arch_mysql_install_packages.changed
+  
 - name: Run mysql_install_db if MySQL packages were changed.
   command: mysql_install_db --user=mysql --basedir=/usr --datadir=/var/lib/mysql
   when: arch_mysql_install_packages.changed