[maven-release-plugin] prepare release disconf-core-2.1
[maven-release-plugin] prepare release disconf-core-2.1

nabilzhang/disconf,nabilzhang/disconf,markyao/disconf,markyao/disconf,knightliao/disconf,markyao/disconf,knightliao/disconf,markyao/disconf,knightliao/disconf,nabilzhang/disconf,markyao/disconf,knightliao/disconf,nabilzhang/disconf,knightliao/disconf,nabilzhang/disconf