…fik which is the default format until now.

* traefik.access.frontend_name and backend_url were set as text so new fields with `_keyword` suffix on their names (traefik.access.frontend_name_keyword) were added to support keyword searches too.
* Added more log lines, including one in Common Log Format
* Added user_identifier field which was hardcoded to '-' before
* Added log test inputs where the user_name and user_identifier were set and not set.
* Added duration field which was missing
* Numeric fields added as string have been converted to long
* Added request count field

…ollow up PR

…d in dissect and in the ingest node again (instead of only the ingest node)