Added test cases for more util methods

[agautam478]

What changed?
And more test cases for nosqlutil.

Why?
to increase code coverage.

How did you test it?
unit test

Potential risks

Release notes

Documentation Changes

[codecov]

Codecov Report

Merging #5854 (dafbfe5) into master (4957d34) will increase coverage by 0.01%.
Report is 1 commits behind head on master.
The diff coverage is n/a.

❗ Current head dafbfe5 differs from pull request most recent head b142687. Consider uploading reports for the commit b142687 to get more accurate results

Additional details and impacted files

see 8 files with indirect coverage changes

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[coveralls]

Pull Request Test Coverage Report for Build 018ea78f-3898-4009-9e64-b962c2f41664

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• 71 unchanged lines in 9 files lost coverage.
• Overall coverage increased (+0.003%) to 66.152%

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Files with Coverage Reduction	New Missed Lines	%
service/history/task/transfer_standby_task_executor.go	2	87.01%
common/task/parallel_task_processor.go	2	93.06%
service/history/task/transfer_active_task_executor.go	2	72.7%
common/util.go	2	91.78%
service/history/execution/mutable_state_util.go	2	78.13%
service/matching/taskListManager.go	4	79.7%
service/history/task/fetcher.go	4	86.08%
common/persistence/nosql/nosqlplugin/cassandra/workflow_parsing_utils.go	17	88.02%
service/history/execution/mutable_state_task_refresher.go	36	62.03%

Totals
Change from base Build 018ea78a-c1f4-4673-af25-d1c6720f523e:	0.003%
Covered Lines:	96805
Relevant Lines:	146337

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💛 - Coveralls