Marshalling headers not working due to CORS filter

Our CORS filter current validates header names with a regex (^[a-zA-Z]\\w-*$) during preflight checks (requests with OPTIONS method) which means marshalling headers like "enrichers.document" cause a server failure due to the usage of the dot.

This is a known issue in "cors-filter" (see here) and has been fixed in 1.9.3 thus we should update to at least this version.