complete functional tests for all URLs (old and new)

### Description
New URLs.
Added an alternative path for ALL requests.
What was '/ngsi9/XXX' is now also '/v1/registry/XXX'.
What was /ngsi10/XXX' is now also '/v1/XXX'.
Also the administrative requests /log, /statistics, /version, etc have been added a path '/v1/admin/'.

All paths, new and old tested in 4 new functional tests.
All old functional tests should now use /v1/* instead of /ngsi9/* and /ngsi10/*. A few functional tests have been converter, but just a few ...

The diff should show the negative lines, as in develop it is empty right now (see https://github.com/telefonicaid/fiware-orion/blob/develop/CHANGES_NEXT_RELEASE). This is due to feature/559_new_url_paths was branched from develop before the 0.15.0 release.

I think the fix is easy: just update feature/559_new_url_paths with develop (using merge), then update task/559_path_part_in_main with feature/559_new_url_paths (using merge).