Include all Magento2 sniffs in Magento2Framework

[fredden]

I have recently opened a pull request on https://github.com/magento/magento2. When I ran the static analysis automated test, some complaints were raised (for unchanged parts of the files which were being fixed/modified). To see these locally, I ran phpcs --standard=Magento2Framework path-to/file.php, however not all the complaints showed. When I ran phpcs --standard=Magento2 path-to/file.php the other complaints were visible. It doesn't seem right that the Magento2Framework standard doesn't include the rules defined in the Magento2 standard. This pull request fixes this inconsistency.