[maven-release-plugin] prepare release checkstyle-7.7
[maven-release-plugin] prepare release checkstyle-7.7

checkstyle/checkstyle,ilanKeshet/checkstyle,sabaka/checkstyle,jochenvdv/checkstyle,romani/checkstyle,jonmbake/checkstyle,checkstyle/checkstyle,checkstyle/checkstyle,sabaka/checkstyle,romani/checkstyle,sharang108/checkstyle,romani/checkstyle,sharang108/checkstyle,ilanKeshet/checkstyle,checkstyle/checkstyle,sabaka/checkstyle,checkstyle/checkstyle,checkstyle/checkstyle,rnveach/checkstyle,rnveach/checkstyle,jochenvdv/checkstyle,rnveach/checkstyle,sharang108/checkstyle,rnveach/checkstyle,romani/checkstyle,ilanKeshet/checkstyle,romani/checkstyle,liscju/checkstyle,jochenvdv/checkstyle,liscju/checkstyle,rnveach/checkstyle,rnveach/checkstyle,jonmbake/checkstyle,liscju/checkstyle,jonmbake/checkstyle,romani/checkstyle