[#4349] - Reports generation is blocked by firewall - path traversal attack pattern

https://example.com/jasperserver/ - works OK, but
https://example.com/jasperserver/reportresource/reportresource?resource=... - returns 403 forbiden due to supposed traversal attack - "resource=net/sf/jasperreports/web/servlets/resources/require/report/jasperreports-report.js"

You can read more about this attack here: https://www.owasp.org/index.php/Path_Traversal