Magento 2 duplicates the «\Interceptor» string constant in 9 places

[dmitrii-fediuk]

https://mage2.pro/t/377

[palamar]

@mage2pro
Please, provide the used version. If the problem is actual for a specific tag, please, specify it and be sure that the latest update was used.

[palamar]

According to contributor guide, tickets without response for two weeks should be closed.
Please feel free to reopen if it's needed.