merge origin#4

Merged

felixz7 merged 2 commits intofelixz7:masterfrom apache:master

Apr 23, 2019

Commits on Apr 22, 2019

update comment for "dynamic" field (#3900 )

liujunzxcv
authored and
carryxyh
committed
[Dubbo-3903] Fix maven package error of dubbo-serialization-gson (#3904 )

maoyiz
authored and
ralf0131
committed