Write more tests for replication task processor

[taylanisikdemir]

What changed?
Added tests for replication/task_processor.go

Why?
Improve coverage

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 70.58%. Comparing base (b38bd0c) to head (92ca080).
Report is 14 commits behind head on master.

Additional details and impacted files

see 17 files with indirect coverage changes

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[coveralls]

Pull Request Test Coverage Report for Build 018fea4d-ed78-495f-8ed2-c45333c2d157

Details

• 0 of 6 (0.0%) changed or added relevant lines in 1 file are covered.
• 402 unchanged lines in 14 files lost coverage.
• Overall coverage decreased (-0.1%) to 70.682%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
service/history/config/config.go	0	6	0.0%

Files with Coverage Reduction	New Missed Lines	%
service/history/queue/timer_queue_processor_base.go	1	77.66%
common/task/weighted_round_robin_task_scheduler.go	2	88.56%
common/task/parallel_task_processor.go	2	93.06%
service/history/task/transfer_active_task_executor.go	2	72.77%
service/history/execution/mutable_state_util.go	2	78.52%
common/persistence/statsComputer.go	3	98.21%
bench/lib/client.go	4	0.0%
service/matching/config/config.go	4	91.49%
service/history/task/fetcher.go	4	86.08%
service/history/task/transfer_standby_task_executor.go	6	86.94%

Totals
Change from base Build 018fea0f-14e3-4984-94e0-5d6d068277b1:	-0.1%
Covered Lines:	105286
Relevant Lines:	148958

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💛 - Coveralls