Using command line options to configure MySQL 8 instead of mounting a config file

tests/travis/install-mysql-8.0.sh

@@ -4,16 +4,14 @@ set -ex
 
 echo "Starting MySQL 8.0..."
 
-echo -e "[mysqld]\ndefault_authentication_plugin=mysql_native_password" > /tmp/mysql-auth.cnf
-
 sudo docker pull mysql:8.0
 sudo docker run \
     -d \
     -e MYSQL_ALLOW_EMPTY_PASSWORD=yes \
     -e MYSQL_DATABASE=doctrine_tests \
-    -v /tmp/mysql-auth.cnf:/etc/mysql/conf.d/auth.cnf:ro \
     -p 33306:3306 \
     --name mysql80 \
-    mysql:8.0
+    mysql:8.0 \
+    --default-authentication-plugin=mysql_native_password
 
 sudo docker exec -i mysql80 bash <<< 'until echo \\q | mysql doctrine_tests > /dev/null 2>&1 ; do sleep 1; done'