[maven-release-plugin] copy for tag checkstyle-6.13

[maven-release-plugin] copy for tag checkstyle-6.12.1

[maven-release-plugin] copy for tag checkstyle-6.12

[maven-release-plugin] copy for tag checkstyle-6.11.2

[maven-release-plugin] copy for tag checkstyle-6.11.1

[maven-release-plugin] copy for tag checkstyle-6.11

[maven-release-plugin] copy for tag checkstyle-6.10.1

[maven-release-plugin] copy for tag checkstyle-6.10

[maven-release-plugin] copy for tag checkstyle-6.9

[maven-release-plugin] copy for tag checkstyle-6.8.2