[maven-release-plugin] copy for tag 2.1.1

[maven-release-plugin] copy for tag 2.1.0

[maven-release-plugin] copy for tag 2.1.0-rc.1

[maven-release-plugin] copy for tag 2.1.0-beta.4

[maven-release-plugin] copy for tag 2.1.0-beta.3

[maven-release-plugin] copy for tag 2.1.0-beta.2

[maven-release-plugin] copy for tag 2.1.0-beta.1

[maven-release-plugin] copy for tag 2.1.0-alpha.2

[maven-release-plugin] copy for tag 2.1.0-alpha.1

[maven-release-plugin] copy for tag 2.0.3