Add unit tests for ConflictResolveWorkflowExecution

[Shaddoll]

What changed?
Add unit tests for ConflictResolveWorkflowExecution

Why?
improve test coverage

How did you test it?
unit tests

Potential risks

Release notes

Documentation Changes

[coveralls]

Pull Request Test Coverage Report for Build 018e105e-6bfd-4971-9f58-67ae49715b31

Details

• 8 of 8 (100.0%) changed or added relevant lines in 1 file are covered.
• 134 unchanged lines in 16 files lost coverage.
• Overall coverage decreased (-0.04%) to 63.133%

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Files with Coverage Reduction	New Missed Lines	%
common/persistence/executionManager.go	2	78.59%
common/persistence/sql/sqlplugin/mysql/db.go	2	79.49%
common/persistence/sql/sqlplugin/mysql/task.go	2	73.68%
common/persistence/statsComputer.go	2	94.64%
common/task/fifo_task_scheduler.go	2	85.57%
service/history/execution/mutable_state_builder.go	2	68.8%
common/persistence/nosql/nosqlplugin/cassandra/tasks.go	4	76.09%
common/persistence/nosql/nosql_task_store.go	5	61.95%
service/history/task/transfer_standby_task_executor.go	6	87.42%
common/persistence/nosql/nosql_execution_store.go	9	63.07%

Totals
Change from base Build 018e1052-01a3-4172-bdb6-43affa32f2d3:	-0.04%
Covered Lines:	92594
Relevant Lines:	146665

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💛 - Coveralls