[maven-release-plugin] copy for tag 2.0.0
Features:
[#6597] supports dolphinscheduler upgrade from 1.x to 2.0 [#6812] speed up the site loading when project exists multi process definitions [#6763] remove the detection of dumplicate task names [#6655] remove the registry monitor
Bug Fix: [#6613] fix bug in task retry mechanism [#6707] fix error when set up the global parameters in process defintion [#6882] fix process cannt finish and its status always be running [#6771] fix failover worker interrupt [#6658] fix task code in bulk definition [#6737] fix event handle twice in two thread pool [#6682] replace task name with task code [#6653] fix netty client create too many channels [#6640] fix PROCESS_HOST_UPDATE_REQUST command donot be supported. [#6591] fix improt process definition error