Fix CI error of copy test

[kevindiu]

Signed-off-by: kevindiu kevin_diu@yahoo.com.hk

Description:

This PR fixes CI error.

Related Issue:

How Has This Been Tested?:

Environment:

• Go Version: 1.16.4
• Docker Version: 19.03.8
• Kubernetes Version: 1.18.2
• NGT Version: 1.12.3

Types of changes:

• Bug fix [type/bug]
• New feature [type/feature]
• Add tests [type/test]
• Security related changes [type/security]
• Add documents [type/documentation]
• Refactoring [type/refactoring]
• Update dependencies [type/dependency]
• Update benchmarks and performances [type/bench]
• Update CI [type/ci]

Changes to Core Features:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your core changes, as applicable?
• Have you successfully ran tests with your changes locally?

Checklist:

• I have read the CONTRIBUTING document.
• I have checked open Pull Requests for the similar feature or fixes?
• I have added tests and benchmarks to cover my changes.
• I have ensured all new and existing tests passed.
• I have commented my code, particularly in hard-to-understand areas
• I have updated the documentation accordingly.

[vdaas-ci]

[CHATOPS:HELP] ChatOps commands.

• 🙆‍♀️ /approve - approve
• 💌 /changelog - replace the PR body by changelog details
• 🍱 /format - format codes and add licenses
• ✅ /gen-test - generate test codes
• 🏷️ /label - add labels
• ⏪ /rebase - rebase master
• 🔚 2️⃣ 🔚 /label actions/e2e-deploy - run E2E deploy & integration test

[github-actions]

🚫 [golangci] _{reported by reviewdog 🐶}
File is not gci-ed (gci)

[codecov]

Codecov Report

Merging #1269 (feec98b) into master (7d95333) will increase coverage by 0.06%.
The diff coverage is n/a.

❗ Current head feec98b differs from pull request most recent head 470b097. Consider uploading reports for the commit 470b097 to get more accurate results

@@            Coverage Diff             @@
##           master    #1269      +/-   ##
==========================================
+ Coverage   17.11%   17.17%   +0.06%     
==========================================
  Files         506      508       +2     
  Lines       31776    31892     +116     
==========================================
+ Hits         5439     5478      +39     
- Misses      26049    26116      +67     
- Partials      288      298      +10     

Impacted Files	Coverage Δ
internal/errgroup/group.go	92.42% <0.00%> (-1.52%)	⬇️
internal/io/io.go	0.00% <0.00%> (ø)
internal/io/copy.go	63.33% <0.00%> (ø)
internal/worker/worker.go	84.37% <0.00%> (+1.04%)	⬆️
internal/worker/queue.go	100.00% <0.00%> (+1.66%)	⬆️

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