[release] Prepare for next development iteration

Change-Id: I874c09568a416197150609b48d536dabbf1d7e47
Get rid of javadoc warnings

Change-Id: Ife025fabedbfd2925b8fa8af7c750ba81705dc70
Error in previous release, pom got wrong dependency

Change-Id: I4ad2de60a651ee5db26ef66f7cdd704df7e480ec
[release] Prepare release 4.2.0

Change-Id: I4d56206fa93ed66b3ce143e64925563a0f88e1af