Issue/329 refactor seeding (#337)

* Fix Contracts class names

* Refactoring of the file seeds so it's not a mess

* StyleCI fixes

tests/FinanceTest.php

@@ -25,6 +25,7 @@ class FinanceTest extends TestCase
     {
         parent::setUp();
         $this->addData('base');
+        $this->addData('fleet');
 
         $this->expenseRepo = app(ExpenseRepository::class);
         $this->fareSvc = app(FareService::class);