Nucleus unit tests part2

[sachinkumargit]

Issue Link

Resolves #21

Description

1. Adding unit tests for following nucleus packages:

• api
  • health
  • result
  • api
• command
• service
  • coverage
  • parser
  • teststats
• testblocklistservice
• testdiscoveryservice
• testexecutionservice
• zstd

2. Add util files for the above listed tests
3. Made necessary changes to utils package to run testdiscovery package test
4. Removed testdata from gitignore and updated secrets test

Fixes # (issue)

Type of change

Please delete options that are not relevant.

• New feature (non-breaking change which adds functionality)

How Has This Been Tested?

• Tested all the tests on local linux machine

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules