Merge pull request #1814 from magento-pangolin/sprint-2.2-develop

[Pangolin] Deliver changes from Sprint 14 - 2.2-develop

 - MQE-528: Robo commands should override certain files.
 - MQE-382: Adding custom "assertElementContainsAttribute" method.
 - MQE-572: Expose selenium configuration from within our .env file
 - MQE-513: added attachment (screenshots/logs) support in Allure report
 - MQE-439: .env.example parameter example comment block
 - MQE-541: changed to use stepKey for test step sequencing.
 - MQE-569: added SampleTests in module blacklist and not allowed to generate
 - MQE-570: Sanitize MAGENTO_BASE_URL (.env file) and Selenium params
 - MQE-574: selector or selectorArray attribute is required for 'click'
 - MQE-583: set release version to 1.0.0 and updated composer dependencies.
 - MQE-347: Use a remove tag instead of a remove attribute
 - MQE-386: MFTF Compatibility with Windows Machine
 - MQE-592: Audit Test Cases on Firefox/Chrome on Windows/OSX
 - MQE-599: Move composer.json, README, etc from EE to CE