We need to disable the faceting output for now, because there are no real facets yet and we need to configure a "keyword" facet, so ext:solr will accept the filter query for the keywords on the detail pages.

- Removed hard coded namespace string
- Added typoscript for configuring previously hard coded namespace string
- Fix usage of HTTP_RAW_POST_DATA which is not supported anymore

Remove tasks which where already removed in develop (see 01c279c9 and 0f8869ac)