Add more unit tests for persistence task types in DataManagerInterfaces

[timl3136]

What changed?
Add unit tests for the common task types and some other task types

Why?
Improve unit test coverage and stability of the platform

How did you test it?
Unit test

Potential risks

Release notes

Documentation Changes

[codecov]

Codecov Report

Merging #5726 (e25a286) into master (cb39e82) will increase coverage by 0.20%.
The diff coverage is n/a.

Additional details and impacted files

see 8 files with indirect coverage changes

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[coveralls]

Pull Request Test Coverage Report for Build 018e14b0-d10b-461e-9b50-5ca53bae8deb

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 81 unchanged lines in 17 files lost coverage.
• Overall coverage increased (+0.1%) to 63.437%

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Files with Coverage Reduction	New Missed Lines	%
common/task/weighted_round_robin_task_scheduler.go	1	89.05%
common/membership/hashring.go	2	82.23%
common/persistence/sql/sqlplugin/mysql/db.go	2	79.49%
common/persistence/sql/sqlplugin/mysql/task.go	2	73.68%
common/task/fifo_task_scheduler.go	2	87.63%
common/task/parallel_task_processor.go	2	93.06%
service/frontend/api/handler.go	2	62.05%
service/history/execution/mutable_state_util.go	2	78.48%
service/history/task/transfer_active_task_executor.go	2	72.38%
service/matching/db.go	2	73.23%

Totals
Change from base Build 018e14af-234b-487e-b5a6-c5632b10bbb6:	0.1%
Covered Lines:	93052
Relevant Lines:	146684

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💛 - Coveralls