Attach screenshots and page source based on selenide config.

[rosolko]

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Context

Checklist

• Sign Allure CLA
• Provide unit tests

[simple-elf]

I think this (#202) solution is better. Because with Configuration.screenshots = true; both selenide and allure will save screenshots (or/and page html source). Files will dublicate in allure-results folder, and in /report/com/class/ folder.

In projects there I'm using Selenide to Allure integration I set Configuration.screenshots = false;

[baev]

fixed via #202

[baev]

@rosolko thanks anyway!