MQE-1650: update MFTF configuration to read Test entities from new location

[KevinBKozan]

Description

• Reduced requirements of composer.json to 1.4 (magento 2.2)

Contribution checklist

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/verification tests (if applicable)
• All automated tests passed successfully (all builds on Travis CI are green)
• Changes to Framework doesn't have backward incompatible changes for tests or have related Pull Request with fixes to tests

[KevinBKozan]

To test, pull 2.2-develop.

• Upgrade MFTF to dev-MFTF-2.5.2-RC, you should get an error
• Upgrade MFTF instead to dev-MQE-1650-Fix, error should be gone

[coveralls]

Coverage increased (+0.6%) to 53.041% when pulling c17c746 on MQE-1650-Fix into 365daa2 on MFTF-2.5.2-RC.