Jenkins 2.14 发布可扩展的持续集成引擎

Jenkins 2.14 发布了，Jenkins 主要用于持续、自动地构建/测试软件项目，如CruiseControl与DamageControl，监控一些定时执行的任务。

本次发布主要改进如下：

Minor optimization in calculation of recent build stability health report. (issue 36629)
Underprivileged users were unable to use the default value of a password parameter. (issue 36476)
Allow keeping builds forever with custom build retention strategies. (issue 26438)
Properly handle exceptions during global configuration form submissions whenSCM Retry Count field is empty. (issue 36387)
When a user aborts the build, this user may be restored after its deletion. (issue 36594)
Prevent potential NullPointerException in the BlockedBecauseOfBuildInProgress build blockage cause visualization. (issue 36592)
CLI commands quiet-down and cancel-quiet-down were extracted from the core to CLI. (issue 35423)
Developer API: Extract listing of computer names to the ComputerSet#getComputerNames()method. (issue 35423)
Developer API: Add a try with resources form of impersonation. (issue 36494)
Developer API: Usage of ItemCategory#MIN_TOSHOW in external plugins is now restricted. (issue 36593)