fixup: remove test user for MySQL

Author: karlwilbur

.github/workflows/ruby.yml

@@ -13,14 +13,12 @@ jobs:
       mysql:
         image: mysql
         env:
-          MYSQL_ROOT_PASSWORD: shhh-it's-a-secret
+          MYSQL_ROOT_PASSWORD: root
           MYSQL_DATABASE: test
-          MYSQL_USER: tester
-          MYSQL_PASSWORD: password
         ports:
           - 3306:3306
         options: >-
-          --health-cmd "mysqladmin ping -h127.0.0.1"
+          --health-cmd "mysqladmin ping"
           --health-interval 10s
           --health-timeout 5s
           --health-retries 5
@@ -49,7 +47,7 @@ jobs:
           - 5.2.4.4
           - 5.1.7
         database_url:
-          - mysql2://tester:password@127.0.0.1:3306/test
+          - mysql2://root:root@127.0.0.1:3306/test
           - postgresql://postgres:password@localhost:5432/test
           - sqlite3:test_db
         exclude: