[maven-release-plugin] copy for tag v6.12.0 

[maven-release-plugin] copy for tag v6.11.0 

[maven-release-plugin] copy for tag v6.10.0 

[maven-release-plugin] copy for tag v6.9.0 

[maven-release-plugin] copy for tag v6.8.1 

[maven-release-plugin] copy for tag v6.8.0 

[maven-release-plugin] copy for tag v6.7.0 

[maven-release-plugin] copy for tag v6.6.0 

[maven-release-plugin] copy for tag v6.5.0 

[maven-release-plugin] copy for tag v6.4.0