Remove powermock from kubernetes plugin

[vishesh92]

Description

This PR removes powermock from kubernetes plugin's tests

Types of changes

• Breaking change (fix or feature that would cause existing functionality to change)
• New feature (non-breaking change which adds functionality)
• Bug fix (non-breaking change which fixes an issue)
• Enhancement (improves an existing feature and functionality)
• Cleanup (Code refactoring and cleanup, that may add test cases)

Feature/Enhancement Scale or Bug Severity

Feature/Enhancement Scale

• Major
• Minor

Bug Severity

• BLOCKER
• Critical
• Major
• Minor
• Trivial

Screenshots (if appropriate):

How Has This Been Tested?

[DaanHoogland]

@blueorangutan package

[blueorangutan]

@DaanHoogland a [SF] Jenkins job has been kicked to build packages. It will be bundled with KVM, XenServer and VMware SystemVM templates. I'll keep you posted as I make progress.

[DaanHoogland]

clgtm, only packaging needed for verification

[codecov]

Codecov Report

Merging #7788 (9c07ee7) into main (8db8aa4) will increase coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff            @@
##               main    #7788   +/-   ##
=========================================
  Coverage     13.42%   13.42%           
- Complexity     9383     9385    +2     
=========================================
  Files          2747     2747           
  Lines        258827   258827           
  Branches      40318    40318           
=========================================
+ Hits          34748    34749    +1     
- Misses       219694   219697    +3     
+ Partials       4385     4381    -4     

see 3 files with indirect coverage changes

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[blueorangutan]

Packaging result [SF]: ✔️ el7 ✔️ el8 ✔️ el9 ✔️ debian ✔️ suse15. SL-JID 6594