mysql: Check we can use MySQL socket auth first

mysql/debian/postinst

@@ -44,7 +44,7 @@ fi
 #
 # Add an admin user with user/password authentication for phpmyadmin if one doesn't already exist
 #
-if [ "$(mysql -u root -se "select exists(select user from mysql.user where user = 'admin');")" = "0" ] && grep -qx 'password = ' /etc/mysql/debian.cnf; then
+if grep -qx 'password = ' /etc/mysql/debian.cnf && [ "$(mysql -u root -se "select exists(select user from mysql.user where user = 'admin');")" = "0" ] ; then
   if [ -e /etc/first-boot.d/.mysql.hash ]; then
     echo "I: Adding 'admin'@'localhost' MySQL user"
     mysql -u root -e "grant all privileges on *.* to 'admin'@'localhost' identified by password '*$(cat /etc/first-boot.d/.mysql.hash)' with grant option;"