Add a new feature which upgrades jenkins and plugin in a docker container

[jxr98]

Make sure that you've checked the boxes below before you submit PR:

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• [ ] Quality Gate Passed. Change this URL to your PR.
• [ ] The coverage is xxx on the new lines
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[codecov-commenter]

Codecov Report

Merging #608 (2b2bd2d) into master (8f2c9f0) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #608   +/-   ##
=======================================
  Coverage   37.98%   37.98%           
=======================================
  Files          13       13           
  Lines         416      416           
=======================================
  Hits          158      158           
  Misses        246      246           
  Partials       12       12           

Flag	Coverage Δ
unittests	37.98% <ø> (ø)

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[jxr98]

This function is based on the Docker SDK provided for golang. To use it, you need to have docker installed locally or remotely. For example. if you have docker installed on another server 209.250.235.50 and expose the Docker Daemon with -H tcp://0.0.0.0:2375, you can pass --docker-ip 209.250.235.50 (you don't need to point the port cuz the default port is 2375). If you have docker installed locally, you can pass --docker-ip 127.0.0.1 or sth else. When Docker and war file are both available, this function will build a image(default name is test and you can change it), create a container and start the container.

[yJunS]

@jxr98 If you are sure you have completed this function, please delete WIP for the title.

[jxr98]

@jxr98 If you are sure you have completed this function, please delete WIP for the title.

Oops. I forgot.

[jxr98]

can you just give me an example of the usage?

Of Course. This start_jenkins.go is used in annother function which I haven't created a pull request for, but I have done most of the work. I am editing some of the prs. I am gonna show you very soon.