4949d4a0ad
Motivation: Due a regression in fd8c1874b4e24a18c562c7013efabcb155395459 we did not correctly set the result for the returned Future if it was build for a Callable. Modifications: - Adjust code to call get() to retrive the correct result for notification of the future. - Add unit test Result: Fixes https://github.com/netty/netty/issues/11072