Attempt to fix test fixtures on linux

Author: Elliot Levin

tests/Tests/Integration/Fixtures/DmsFixture.php

@@ -42,6 +42,11 @@ protected function seed(Application $app)
      */
     public function setUpBeforeClass(Application $app)
     {
+        $stubFileDirectory = dirname($this->dbStubFile());
+        if (!is_dir($stubFileDirectory)) {
+            mkdir($stubFileDirectory, 0777, true);
+        }
+
         /** @var LaravelMigrationGenerator $migrationGenerator */
         $migrationsPath = $this->migrationsPath();
         if (!is_dir($migrationsPath)) {