Provide an exposed UDP port test case

[KyleAure]

Fixes #4667

[nathsomdatta59]

I followed your snippet to expose a UDP port. My application is a UDP client and sending messages to the UDP port. Following your code snippet, I could expose a UDP port and mapped a local port to the docker port. But when I am trying to listen to the port, it is saying "Address already in use". I am using Junit to test. My port mapping looks like below :
2024-04-29T12:46:40.395Z INFO 680489 --- [ main] m.s.p.s.c.t.e.g.GudSimContainer : Ports mapping : {8080/tcp=[Lcom.github.dockerjava.api.model.Ports$Binding;@49f09ccf, 4991/udp=[Lcom.github.dockerjava.api.model.Ports$Binding;@541276dc}