Fixing ArchiveWebTest, now that test.php is used (which disables the logger),...

Fixing ArchiveWebTest, now that test.php is used (which disables the logger), we must enable it in a test class override method, since this test checks the log output.

Fixing LogTest now that NullLogger is used for test environment setup.

Make sure translations are loaded in EnvironmentValidationTest.php.

Make sure the logger is enabled for ArchiveCronTest.