[upd] update tvaTest & tva

src/tva.php

 <?php declare(strict_types=1);
+namespace project_jenkins_php\src;
+
 class Product
 {
     const FOOD_PRODUCT = 'food';

tests/tvaTest.php

 <?php declare(strict_types=1);
-#namespace App\Tests\Entity;
+namespace project_jenkins_php\tests;
 use project_jenkins_php\src\tva;
 #require "tva.php";
 use PHPUnit\Framework\TestCase;
+
 class ProductTest extends TestCase
 {
     public function testcomputeTVAFoodProduct()