Refactor order controller checks

[PululuK]

Questions	Answers
Description?	Refactor order controller checks.
Type?	refacto
BC breaks?	no
Deprecations?	no
Fixed ticket?	N/A
How to test?	See description bellow

Make sur that the module can work in the customs orders controllers

class MyCutomOrderController extends OrderControllerCore
{
    /** @var string */
    public $php_self = 'my-custom-order';
}

[ps-jarvis]

Hello @PululuK!

This is your first pull request on ps_onepagecheckout repository of the PrestaShop project.

Thank you, and welcome to this Open Source community!

[ThbPS]

Hello @PululuK,

Thank you for your contribution.

This module is still under active development.
Could you please fix the PHP-CS-Fixer issues and rebase your branch?