chore: test db-pool on travis

test/e2e/helpers/database-init.js

@@ -54,8 +54,8 @@ module.exports = async function init(databaseSchema = 'test', getLogger) {
     const options = {
         databaseUrl: require('./database-config').getDatabaseUrl(),
         databaseSchema,
-        minPool: 0,
-        maxPool: 0,
+        minPool: 1,
+        maxPool: 2,
         getLogger,
     };