Add new feature to backup jenkins relying on thinBackup plugin

[jxr98]

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Codecov Report

Merging #638 (92e4afb) into master (cd3ef72) will not change coverage. The diff coverage is n/a.

:exclamation: Current head 92e4afb differs from pull request most recent head 3cf15f6. Consider uploading reports for the commit 3cf15f6 to get more accurate results

@@           Coverage Diff           @@
##           master     #638   +/-   ##
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  Coverage   37.98%   37.98%           
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  Files          13       13           
  Lines         416      416           
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  Hits          158      158           
  Misses        246      246           
  Partials       12       12           

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

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[jxr98]

This function backs up global and job specific configurations relying on thinBackup plugin. I found an url which can trigger thinBackup to backup, but it doesn't return any message. Thus, jcli cannot handle errors which may happen and cannot make sure that the backup succeeded. I figured out a solution which is the --check flag. If jcli can access the backup directory set in thinBackup plugin, '--check true' is recommended to be parsed to backup command and then jcli will check if a new directory which follows a name pattern is created.

[LinuxSuRen]

still working on this PR?

[jxr98]

still working on this PR?

I think it is done for now and I created a pull request in thinBackup plugin repository. The pr is waiting to be reviewed. Now this backup function can not check if backup succeeds in remote computer.

[LinuxSuRen]

I think it is done for now

WIP means working in progress