[maven-release-plugin] copy for tag mug-root-6.6

[maven-release-plugin] copy for tag mug-root-6.5

[maven-release-plugin] copy for tag mug-root-6.4

[maven-release-plugin] copy for tag mug-root-6.3

[maven-release-plugin] copy for tag mug-root-6.1

[maven-release-plugin] copy for tag mug-root-6.0

[maven-release-plugin] copy for tag mug-root-5.9

[maven-release-plugin] copy for tag mug-root-5.8

[maven-release-plugin] copy for tag mug-root-5.7

[maven-release-plugin] copy for tag mug-root-5.6