Remove powermock from network elements

[vishesh92]

Description

This PR removes powermock from network-elements (tungsten & elastic-loadbalancer).

After this PR, powermock usage is as follows:

git grep -i "PowerMockito" | tr "/" " "| awk '{print $1, $2, $3}' | sort | uniq -c  
     76 api src test
     51 core src test
     37 engine schema src
     68 engine storage configdrive
      9 engine storage snapshot
      3 plugins database quota
    150 plugins hypervisors kvm
      3 plugins hypervisors vmware
     40 plugins hypervisors xenserver
    202 server src test
      4 services console-proxy server
      2 services secondary-storage server
      7 vmware-base src test

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?

[codecov]

Codecov Report

Merging #7791 (be4fd17) into main (a738204) will increase coverage by 0.81%.
Report is 1 commits behind head on main.
The diff coverage is n/a.

@@             Coverage Diff              @@
##               main    #7791      +/-   ##
============================================
+ Coverage     13.43%   14.25%   +0.81%     
- Complexity     9392     9963     +571     
============================================
  Files          2747     2747              
  Lines        258827   258841      +14     
  Branches      40318    40311       -7     
============================================
+ Hits          34774    36891    +2117     
+ Misses       219671   217177    -2494     
- Partials       4382     4773     +391     

see 46 files with indirect coverage changes

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[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.

[blueorangutan]

Packaging result [SF]: ✔️ el7 ✔️ el8 ✔️ el9 ✔️ debian ✔️ suse15. SL-JID 6605

[DaanHoogland]

I see no strange things in the (test) code and packaging works => let's merge

[harikrishna-patnala]

PR increases coverage by 0.81%.

LGTM