fix mysql version

docker-compose.test.yml

@@ -1,7 +1,7 @@
 version: "2"
 services:
   mysql:
-    image: mariadb
+    image: mariadb:10.7
     container_name: test_mysql
     networks:
      - testfet
@@ -25,7 +25,7 @@ services:
     networks:
      - testfet
     environment:
-      MYSQL_DATABASE: etherpaddb
+      MYSQL_DATABASE: etherpaddb:10.7
       MYSQL_USER: user
       MYSQL_PASSWORD: "hgu"
       MYSQL_COLLATION: utf8_general_ci