Add functional test to test facet configuration including:
- Mapping (indexing)
- Searching (retrieving of facets)
- Filter (already existed, now based on facet case sensitive)
* To support further configuration, specific to identifiers / tables.
* E.g. mapping and boost configuration should be possible.
* Adjust docs and settings.
* Adjust tests and code.
* 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.