Try to fix Travis sqlite errors

.env.testing

@@ -22,8 +22,8 @@ DB_DATABASE=:memory:
 # DB_HOST=localhost
 # DB_PORT=3306
 # DB_DATABASE=2fauth_test
-# DB_USERNAME=test_user
-# DB_PASSWORD=password
+# DB_USERNAME=travis
+# DB_PASSWORD=
 
 BCRYPT_ROUNDS=4
 

phpunit.xml

@@ -31,5 +31,7 @@
     <php>
         <env name="APP_ENV" value="testing"/>
         <!-- following values override .env.testing vars -->
+        <env name="DB_CONNECTION" value="testing"/>
+        <env name="DB_DATABASE" value=":memory:"/>
     </php>
 </phpunit>