Support install new tool outside continer using curveadm.

[caoxianfei1]

现在我们支持在容器里面安装新工具，但是有的时候我们并不想进入容器再使用curve命令。我们希望提供一个命令，例如curveadm install tool 可以在指定的宿主机上安装curve新工具，并且可以直接将其需要的配置文件填写好并放在指定的位置。

新工具的安装可以参考文档：https://github.com/opencurve/curve/tree/master/tools-v2#install

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[0fatal]

hi, I'm a student majoring in software engineering in hdu, who is interested in distributed system. I'm good at golang and javascript. Familiar at kubernetes and linux, I wish to contribute to this task.