Improves test portability by resolving 127.0.0.1:0 to get a random free port instead of the hard coded one. Now the test works if you have a running node on the same interface already. Fixes #15685
Improves test portability by resolving 127.0.0.1:0 to get a random free port instead of the hard coded one. Now the test works if you have a running node on the same interface already. Fixes #15685