Added tests for CompleteTasks

[jakobht]

What changed?

• Unit tests for CompleteTasks
• Unit tests for CompleteTasksLessThan

Why?
Increase coverage

How did you test it?

Potential risks

Release notes

Documentation Changes

[coveralls]

Pull Request Test Coverage Report for Build 018faa93-0656-487c-af1a-f68af9c95d35

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 61 unchanged lines in 11 files lost coverage.
• Overall coverage increased (+0.008%) to 69.468%

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Files with Coverage Reduction	New Missed Lines	%
service/matching/tasklist/db.go	2	73.23%
common/peerprovider/ringpopprovider/config.go	2	81.58%
common/persistence/sql/sqlplugin/mysql/task.go	2	73.68%
common/persistence/sql/sqlplugin/mysql/db.go	2	79.49%
common/log/tag/tags.go	3	50.46%
service/history/task/transfer_standby_task_executor.go	4	87.24%
service/matching/tasklist/matcher.go	4	88.66%
service/history/task/fetcher.go	4	86.08%
common/task/fifo_task_scheduler.go	7	82.47%
service/matching/tasklist/task_reader.go	11	75.07%

Totals
Change from base Build 018faa62-bb7e-4a04-89d5-ced9d0d49d30:	0.008%
Covered Lines:	102409
Relevant Lines:	147418

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💛 - Coveralls

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.87%. Comparing base (edc5880) to head (dfe581c).

Additional details and impacted files

see 7 files with indirect coverage changes

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