Change protocol strings to enum values in parsing Protocol options

[Attyuttam]

Description

This PR...
Fixes: #11821

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
• Test (unit or integration test code)

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?

How did you try to break this feature and the system with this change?

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[codecov]

Codecov Report

❌ Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 17.55%. Comparing base (8171d95) to head (6dc89a0).
⚠️ Report is 224 commits behind head on main.

Files with missing lines	Patch %	Lines
...-proxy/rdpconsole/src/main/java/common/Client.java	0.00%	4 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main   #12135      +/-   ##
============================================
- Coverage     17.56%   17.55%   -0.01%     
+ Complexity    15538    15537       -1     
============================================
  Files          5912     5912              
  Lines        529383   529383              
  Branches      64660    64660              
============================================
- Hits          92984    92956      -28     
- Misses       425941   425968      +27     
- Partials      10458    10459       +1     

Flag	Coverage Δ
uitests	3.58% <ø> (ø)
unittests	18.62% <0.00%> (-0.01%)	⬇️

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[DaanHoogland]

some alternative (just for consideration)

[DaanHoogland]

Suggested change

	Protocol protocol;
	Protocol protocol;
	try {
	protocol = Protocol.valueOf(protocolName);
	} catch (IllegalArgumentException e) {
	protocol = Protocol.NONE;
	}

[weizhouapache]

can use this instead

        Protocol protocol = EnumUtils.getEnumIgnoreCase(Protocol.class, protocolName, Protocol.NONE);

btw: no issues with the class, it is not used ...

[github-actions]

This pull request has merge conflicts. Dear author, please fix the conflicts and sync your branch with the base branch.