[maven-release-plugin] copy for tag 2.6

[maven-release-plugin] copy for tag 2.5

[maven-release-plugin] copy for tag 2.4

[maven-release-plugin] copy for tag 2.3

[maven-release-plugin] copy for tag 2.2

[maven-release-plugin] copy for tag 2.1

[maven-release-plugin] copy for tag 2.0

[maven-release-plugin] copy for tag 1.6

[maven-release-plugin] copy for tag 1.6-RC1

[maven-release-plugin] copy for tag 1.5