MQE-610: [PHPMD] Reduce Cyclomatic Complexity in Problem Methods

[soumyau]

Refactored to keep Cyclomatic complexity <= 10.
Added comments to below files to refactor later
** Config/FileResolver/Module.php
** Config/Converter.php
** Config/Dom.php

Description

Fixed Issues (if relevant)

1. magento/magento2-functional-testing-framework#<issue_number>: Issue title
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

[coveralls]

Coverage increased (+1.5%) to 53.578% when pulling cc7a6a7 on MQE-610 into e850699 on develop.

[coveralls]

Coverage increased (+1.5%) to 53.578% when pulling cc7a6a7 on MQE-610 into e850699 on develop.

[coveralls]

Coverage increased (+1.5%) to 53.578% when pulling cc7a6a7 on MQE-610 into e850699 on develop.

[coveralls]

Coverage decreased (-1.5%) to 52.343% when pulling 01fb9fd on MQE-610 into 50ace76 on develop.

[soumyau]

Fixed as per review comments.

[jilu1]

Code change looks good, please run builds to double check.