[maven-release-plugin] prepare release checkstyle-6.7
[maven-release-plugin] prepare release checkstyle-6.7

cs1331/checkstyle,WonderCsabo/checkstyle,autermann/checkstyle,bansalayush/checkstyle,WilliamRen/checkstyle,mkordas/checkstyle,attatrol/checkstyle,sharang108/checkstyle,izishared/checkstyle,FeodorFitsner/checkstyle,jonmbake/checkstyle,pietern/checkstyle,sirdis/checkstyle,autermann/checkstyle,izishared/checkstyle,designreuse/checkstyle,Godin/checkstyle,nikhilgupta23/checkstyle,beckerhd/checkstyle,ivanov-alex/checkstyle,liscju/checkstyle,attatrol/checkstyle,AkshitaKukreja30/checkstyle,rnveach/checkstyle,sirdis/checkstyle,rmswimkktt/checkstyle,MEZk/checkstyle,FeodorFitsner/checkstyle,romani/checkstyle,naver/checkstyle,izishared/checkstyle,Godin/checkstyle,sharang108/checkstyle,WilliamRen/checkstyle,sabaka/checkstyle,ivanov-alex/checkstyle,HubSpot/checkstyle,romani/checkstyle,ilanKeshet/checkstyle,StetsiukRoman/checkstyle,universsky/checkstyle,rnveach/checkstyle,jochenvdv/checkstyle,rnveach/checkstyle,pietern/checkstyle,FeodorFitsner/checkstyle,jasonchaffee/checkstyle,jochenvdv/checkstyle,vboerchers/checkstyle,AkshitaKukreja30/checkstyle,checkstyle/checkstyle,MEZk/checkstyle,rnveach/checkstyle,checkstyle/checkstyle,sirdis/checkstyle,vboerchers/checkstyle,rnveach/checkstyle,jonmbake/checkstyle,AkshitaKukreja30/checkstyle,HubSpot/checkstyle,romani/checkstyle,rmswimkktt/checkstyle,rmswimkktt/checkstyle,sabaka/checkstyle,romani/checkstyle,WilliamRen/checkstyle,sabaka/checkstyle,StetsiukRoman/checkstyle,llocc/checkstyle,checkstyle/checkstyle,ivanov-alex/checkstyle,beckerhd/checkstyle,another-dave/checkstyle,HubSpot/checkstyle,llocc/checkstyle,Godin/checkstyle,designreuse/checkstyle,zofuthan/checkstyle-1,mkordas/checkstyle,designreuse/checkstyle,Bhavik3/checkstyle,another-dave/checkstyle,nikhilgupta23/checkstyle,liscju/checkstyle,ilanKeshet/checkstyle,cs1331/checkstyle,baratali/checkstyle,naver/checkstyle,philwebb/checkstyle,zofuthan/checkstyle-1,Bhavik3/checkstyle,WonderCsabo/checkstyle,vboerchers/checkstyle,philwebb/checkstyle,gallandarakhneorg/checkstyle,autermann/checkstyle,MEZk/checkstyle,jochenvdv/checkstyle,beckerhd/checkstyle,another-dave/checkstyle,jasonchaffee/checkstyle,baratali/checkstyle,rnveach/checkstyle,zofuthan/checkstyle-1,Bhavik3/checkstyle,romani/checkstyle,jasonchaffee/checkstyle,pietern/checkstyle,universsky/checkstyle,philwebb/checkstyle,checkstyle/checkstyle,gallandarakhneorg/checkstyle,checkstyle/checkstyle,gallandarakhneorg/checkstyle,checkstyle/checkstyle,universsky/checkstyle,bansalayush/checkstyle,bansalayush/checkstyle,llocc/checkstyle,liscju/checkstyle,baratali/checkstyle,mkordas/checkstyle,attatrol/checkstyle,WonderCsabo/checkstyle,sharang108/checkstyle,naver/checkstyle,cs1331/checkstyle,jonmbake/checkstyle,StetsiukRoman/checkstyle,ilanKeshet/checkstyle,romani/checkstyle,nikhilgupta23/checkstyle