issue-import judge data length about estimate time and close time

[chengjoey]

What type of this PR

Add one of the following kinds:
/kind bugfix

What this PR does / why we need it:

issue-import judge data length about estimate time and close time

Which issue(s) this PR fixes:

• Fixes #your-issue_number
• Erda Cloud Issue Link

Specified Reviewers:

/assign @your-reviewer

ChangeLog

Language	Changelog
🇺🇸 English	Fix the bug that import issue status code 502 in dopplatform
🇨🇳 中文	修复了导入事项502的问题

Need cherry-pick to release versions?

Add comment like /cherry-pick release/1.0 when this PR is merged.

For details on the cherry pick process, see the cherry pick requests section under CONTRIBUTING.md.

[codecov]

Codecov Report

Merging #3136 (00e58d1) into master (4428044) will increase coverage by 0.02%.
The diff coverage is 69.23%.

@@            Coverage Diff             @@
##           master    #3136      +/-   ##
==========================================
+ Coverage   17.45%   17.48%   +0.02%     
==========================================
  Files        1369     1369              
  Lines      140799   140808       +9     
==========================================
+ Hits        24582    24624      +42     
+ Misses     113673   113630      -43     
- Partials     2544     2554      +10     

Impacted Files	Coverage Δ
modules/dop/services/issue/convert.go	56.44% <69.23%> (+9.32%)	⬆️
.../components/cmp-dashboard-nodes/cpuTable/render.go	19.23% <0.00%> (+0.36%)	⬆️
...mponents/cmp-dashboard-nodes/common/table/table.go	16.42% <0.00%> (+0.79%)	⬆️
.../components/cmp-dashboard-nodes/memTable/render.go	23.76% <0.00%> (+4.15%)	⬆️

[sfwn]

/approve