[maven-release-plugin] copy for tag jenkins-1.519

[maven-release-plugin] copy for tag jenkins-1.518

[maven-release-plugin] copy for tag jenkins-1.517

[maven-release-plugin] copy for tag jenkins-1.516

[maven-release-plugin] copy for tag jenkins-1.515

[maven-release-plugin] copy for tag jenkins-1.514

[maven-release-plugin] copy for tag jenkins-1.509.1

[maven-release-plugin] copy for tag jenkins-1.513

[maven-release-plugin] copy for tag jenkins-1.512

[JENKINS-17648] Bump ssh-slaves version to effectively backport 71a85…

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