Integration tests: include MariaDB as well

just to be sure we're compatible with this RDBMS and not only MySQL.

.github/workflows/integration-tests.yml

@@ -17,8 +17,13 @@ jobs:
         database:
           - name: mysql
             pretty_name: MySQL
+            image: mysql:latest
+          - name: mysql
+            pretty_name: MariaDB
+            image: mariadb:latest
           - name: pgsql
             pretty_name: PostgreSQL
+            image: postgres:latest
 
     name: ${{ matrix.database.pretty_name }}
     runs-on: ubuntu-latest
@@ -41,6 +46,8 @@ jobs:
         run: ./icingadb-test -icingatesting.debuglog debug.log -test.v
         env:
           ICINGADB_TESTS_DATABASE_TYPE: ${{ matrix.database.name }}
+          ICINGA_TESTING_MYSQL_IMAGE: ${{ matrix.database.image }}
+          ICINGA_TESTING_PGSQL_IMAGE: ${{ matrix.database.image }}
           ICINGA_TESTING_ICINGADB_BINARY: ${{ github.workspace }}/icingadb
           ICINGA_TESTING_ICINGADB_SCHEMA_MYSQL: ${{ github.workspace }}/schema/mysql/schema.sql
           ICINGA_TESTING_ICINGADB_SCHEMA_PGSQL: ${{ github.workspace }}/schema/pgsql/schema.sql