test: unit test for daemon/config/config.go: getConflictConfiguration…

[simonla]

Ⅰ. Describe what this PR did

add unit test for daemon/config/config.go: getConflictConfigurations

Ⅱ. Does this pull request fix one issue?

fix #1759

Ⅲ. Describe how you did it

we have four cases :

• case1: no conflict => do no thing
• case2: slice conflict =>do no thing
• case3: one conflict => return value which key is conflict
• case4: multiple conflict => return each conflict value

Ⅳ. Describe how to verify it

Ⅴ. Special notes for reviews

We are BaiJi Term 9

[pouchrobot]

@simonla Thanks for your contribution. 🍻
Please sign off in each of your commits.

[pouchrobot]

We found this is your first time to contribute to Pouch, @simonla
👏 We really appreciate it.
Just remind that you have read the contribution guide: https://github.com/alibaba/pouch/blob/master/CONTRIBUTING.md
If you didn't, you should do that first. If done, welcome again and please enjoy hacking! 🍻

[pouchrobot]

ping @simonla
Conflict happens after merging a previous commit.
Please rebase the branch against master and push it back again. Thanks a lot.

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (master@afc7a21). Click here to learn what that means.
The diff coverage is n/a.

@@           Coverage Diff            @@
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  Files             ?     200           
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  Hits              ?    8410           
  Misses            ?    6189           
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Flag	Coverage Δ
#critest	33.57% <ø> (?)
#integrationtest	40.83% <ø> (?)
#unittest	20.53% <ø> (?)