Fix tests

- Fix InstallerTest case
- Fix native function mocking
- Add returntype for Unit-Tests
- Fixing ExtendedPDO test troubles
- Fix wrong class inheritance path for DatabaseTestTrait.php
- Fix SyslogLogger Server Exception for PHP8
- Add user/contact to database.fixture.php
- Avoid invalid rollbacks for test setup in PHP8

tests/DatabaseTest.php

@@ -27,4 +27,18 @@ namespace Friendica\Test;
 abstract class DatabaseTest extends MockedTest
 {
 	use DatabaseTestTrait;
+
+	protected function setUp(): void
+	{
+		$this->setUpDb();
+
+		parent::setUp();
+	}
+
+	protected function tearDown(): void
+	{
+		$this->tearDownDb();
+
+		parent::tearDown();
+	}
 }