Re-factor our test to have a consistent coding standard

[jellypuno]

Discussed in #1480

^{Originally posted by jellypuno September 9, 2021}
Currently our tests have 2 different coding standard. (please see ZoweUSSNode.unit.test.ts and dataset>actions.unit.test) Let's factor the unit test once again to make the coding consistent. Also, the extensible API are not mocked properly. Let's check our tests and make sure that they are mocked properly.

[JillieBeanSim]

Captured from #1028

• Test for API package test:
  • Initialization
  • Profile Loading
• Moving all to parent unit test package so it could be re-used by other packages
• Refactoring of Integration Test

[github-actions]

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[JillieBeanSim]

This enhancement has had no community activity for 12 months. The issue also has less than 10 up-votes by the community. No action on this enhancement is targeted for the next 2 calendar quarters. Therefore, this enhancement is being closed. If you feel that this enhancement should continue to be available for community up-votes, you may reopen this issue.