netty: Memory leak in the latest netty version when executing tests

I just updated to the latest netty version (4.1.26.Final, boring.ssl 2.0.12.Final) and my test run had crashed due to OutOfMemoryError. I have a special test set with 200 tests. Every test starts the server and at the end of test stops it. Before tests were executed just fine. With the latest version on 100-th test, my RAM of 32 GBs is out.

I haven’t dig into it yet, just let you know. Probably this is related to recent “finalizer” changes and object cleaner.

java version "10.0.1" 2018-04-17
Java(TM) SE Runtime Environment 18.3 (build 10.0.1+10)
Java HotSpot(TM) 64-Bit Server VM 18.3 (build 10.0.1+10, mixed mode)

Prev version was:

4.1.25.Final boring.ssl 2.0.8.Final