Do not introduce unnecessary changes into pull request for TYPO3 CMS 9
update.
* Trim trailing whitespace.
* Do not introduce blank line before namespace definition with this pull
request.
* Add posix new line at end of file.
In order to use the plugin with different configurations on same site,
we can not use ConfigurationContainerInterface as a Singleton.
This would prevents us from using different configuration setups.
* Add typoscript option which TYPO3 tables should be processed and which
should not be processed.
* Respect new optiion in hook.
* Also add necessary tests.
* Remove old no longer needed tests for hook.
* TCAIndexer is now able to resolve relations of any kind by using TYPO3
Core API.
* Indexed will be a single string or an array, depending of how many
relations were resolved.
* The same value will be indexed as shown by TCA in backend while
editing or displaying.