Fix named parameters in tests for PHP 8
Fix named parameters in tests for PHP 8

Passing an associative array to ReflectionClass::newInstanceArgs
now uses named parameters in PHP 8. The parameter names here didn't
quite match — we were using snake case instead of camel case

bugsnag/bugsnag-symfony,bugsnag/bugsnag-symfony,bugsnag/bugsnag-symfony,bugsnag/bugsnag-symfony