[maven-release-plugin] copy for tag parent-2.1.0

[maven-release-plugin] copy for tag parent-2.1.0-RC1

[maven-release-plugin] copy for tag parent-2.0.0

[maven-release-plugin] copy for tag parent-2.0.0-RC2

[maven-release-plugin] copy for tag parent-2.0.0-RC1

[maven-release-plugin] copy for tag parent-1.6.0

[maven-release-plugin] copy for tag parent-1.5.4

[maven-release-plugin] copy for tag parent-1.5.3

[maven-release-plugin] copy for tag parent-1.5.2

[maven-release-plugin] copy for tag parent-1.5.1