Improve some UserVmManagerImpl's methods name and docs

[GutoVeronezi]

Description

This PR renames some UserVmManagerImpl's methods and improve their javadocs to make them more intuitive.

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)
• build/CI

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?

[GutoVeronezi]

@GaOrtiga @weizhouapache I did some improvements to the methods names and javadocs in order to avoid confusion in the future.

[GutoVeronezi]

@blueorangutan package

[blueorangutan]

@GutoVeronezi a [SL] 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.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (6af1c25) 30.79% compared to head (247534f) 30.79%.

Additional details and impacted files

@@            Coverage Diff            @@
##               main    #8673   +/-   ##
=========================================
  Coverage     30.79%   30.79%           
- Complexity    33115    33123    +8     
=========================================
  Files          5353     5353           
  Lines        374626   374626           
  Branches      54642    54642           
=========================================
+ Hits         115358   115369   +11     
- Misses       243942   243966   +24     
+ Partials      15326    15291   -35     

Flag	Coverage Δ
simulator-marvin-tests	24.67% <57.14%> (+<0.01%)	⬆️
uitests	4.38% <ø> (ø)
unit-tests	16.43% <85.71%> (-0.01%)	⬇️

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[blueorangutan]

Packaging result [SF]: ✔️ el7 ✔️ el8 ✔️ el9 ✔️ debian ✔️ suse15. SL-JID 8707

[sureshanaparti]

clgtm

[GaOrtiga]

Good clarifications.

CLTM.

[weizhouapache]

code lgtm

[weizhouapache]

Merging as this just renames some methods.