Fix MEMORY storage engine test

The current testcase was inserting the same value in a SERIAL column,
which is an ALIAS for BIGINT UNSIGNED NOT NULL AUTO_INCREMENT UNIQUE.
Duplicate values are not allowed.

debian/gitlab-ci.yml

@@ -191,7 +191,7 @@ test features:
     - mariadb -e "SELECT * FROM db.t_innodb; INSERT INTO db.t_innodb VALUES (3,'"'"'foo'"'"'),(4,'"'"'bar'"'"')"
     - mariadb -e "SELECT * FROM db.t_myisam; INSERT INTO db.t_myisam VALUES (3,'"'"'foo'"'"'),(4,'"'"'bar'"'"')"
     - mariadb -e "SELECT * FROM db.t_aria; INSERT INTO db.t_aria VALUES (3,'"'"'foo'"'"'),(4,'"'"'bar'"'"')"
-    - mariadb -e "SELECT * FROM db.t_memory; INSERT INTO db.t_memory VALUES (1,'"'"'foo'"'"'),(2,'"'"'bar'"'"')"
+    - mariadb -e "SELECT * FROM db.t_memory; INSERT INTO db.t_memory VALUES (3,'"'"'foo'"'"'),(4,'"'"'bar'"'"')"
     - mariadb -e "SELECT COUNT(*) FROM db.v_merge"
     - mariadb -e "SELECT COUNT(*) FROM db.v_temptable"
     - mariadb -e "CALL db.p()"