[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…

…21cb5537b29bd32424dfe05d87e1c8d218f

[maven-release-plugin] copy for tag jenkins-1.511