Fix not redirecting to URL

[roshanbudhathoki]

Updated RedirectCallBack to fix not redirecting to a url problem. It was having problem here on two of these functions

private function routeExists($route)
    {
        try {
            $this->router->assemble(array(), array('name' => $route));
        } catch (Exception\RuntimeException $e) {
            return false;
        }
        return true;
    }

protected function getRedirect($currentRoute, $redirect = false)
    {
        $useRedirect = $this->options->getUseRedirectParameterIfPresent();
        $routeExists = ($redirect && $this->routeExists($redirect));
        if (!$useRedirect || !$routeExists) {
            $redirect = false;
        }

        switch ($currentRoute) {
            case 'zfcuser/register':
            case 'zfcuser/login':
            case 'zfcuser/authenticate':
                $route = ($redirect) ?: $this->options->getLoginRedirectRoute();
                return $this->router->assemble(array(), array('name' => $route));
                break;
            case 'zfcuser/logout':
                $route = ($redirect) ?: $this->options->getLogoutRedirectRoute();
                return $this->router->assemble(array(), array('name' => $route));
                break;
            default:
                return $this->router->assemble(array(), array('name' => 'zfcuser'));
        }
    }

[stijnhau]

Maybe you shuld also extend the test to show when it was failing exactly and that the fix works?