Fix #1611: 404 error is propagated as 500

[banterCZ]

No description provided.

[zcgandcomp]

This project is actually not broken - it returns proper 404 Status.
But we can normalize Error Handling so we avoid the possible problem in the future.
Honestly, usually I stick to the rule "do not repair what is not broken", but I will leave it to you as I can see some benefit of preventing the issue in the future.

[banterCZ]

This project is actually not broken - it returns proper 404 Status. But we can normalize Error Handling so we avoid the possible problem in the future. Honestly, usually I stick to the rule "do not repair what is not broken", but I will leave it to you as I can see some benefit of preventing the issue in the future.

Actually, tpp-engine and next-step return 500. And for webflow, I am also able to get this stacktrace with 500

2024-03-28T10:14:34.785+01:00 ERROR 50863 --- [powerauth-webflow] [nio-9080-exec-4] [31b885708b52300f02573a15f3dd56a2-f7939733fa80e2ab] i.g.s.p.a.w.e.DefaultExceptionResolver   : Error occurred in Web Flow server

org.springframework.web.servlet.resource.NoResourceFoundException: No static resource resources/css/bootstrap.min.css.map.
	at org.springframework.web.servlet.resource.ResourceHttpRequestHandler.handleRequest(ResourceHttpRequestHandler.java:585) ~[spring-webmvc-6.1.5.jar:6.1.5]
	at org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter.handle(HttpRequestHandlerAdapter.java:52) ~[spring-webmvc-6.1.5.jar:6.1.5]
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1089) ~[spring-webmvc-6.1.5.jar:6.1.5]
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:979) ~[spring-webmvc-6.1.5.jar:6.1.5]
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1014) ~[spring-webmvc-6.1.5.jar:6.1.5]
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:903) ~[spring-webmvc-6.1.5.jar:6.1.5]
	at jakarta.servlet.http.HttpServlet.service(HttpServlet.java:564) ~[tomcat-embed-core-10.1.19.jar:6.0]
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:885) ~[spring-webmvc-6.1.5.jar:6.1.5]