[maven-release-plugin] prepare release 2.3.8

[maven-release-plugin] copy for tag 2.3.7

[maven-release-plugin] copy for tag 2.3.6

[maven-release-plugin] copy for tag 2.3.5

[maven-release-plugin] copy for tag 2.3.4

[maven-release-plugin] copy for tag 2.3.3

[maven-release-plugin] copy for tag 2.3.2

[maven-release-plugin] copy for tag 2.3.1

[maven-release-plugin] copy for tag 2.3.0

[maven-release-plugin] copy for tag 2.3.0-beta