Change incorrect licenses in Security Principal files

[ruai0511]

Description

As per a follow up for PR #5606, this changes the incorrect license from some files

Issues Resolved

[List any issues this PR will resolve]

Is this a backport? If so, please add backport PR # and/or commits #, and remove backport-failed label from the original PR.

Do these changes introduce new permission(s) to be displayed in the static dropdown on the front-end? If so, please open a draft PR in the security dashboards plugin and link the draft PR here

Testing

[Please provide details of testing done: unit testing, integration testing and manual testing]

Check List

• New functionality includes testing
• New functionality has been documented
• New Roles/Permissions have a corresponding security dashboards plugin PR
• API changes companion pull request created
• Commits are signed per the DCO using --signoff

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.
For more information on following Developer Certificate of Origin and signing off your commits, please check here.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 72.94%. Comparing base (892ca52) to head (a88f2ff).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5675      +/-   ##
==========================================
- Coverage   73.11%   72.94%   -0.18%     
==========================================
  Files         416      420       +4     
  Lines       26181    26277      +96     
  Branches     3960     3973      +13     
==========================================
+ Hits        19143    19167      +24     
- Misses       5122     5191      +69     
- Partials     1916     1919       +3     

Files with missing lines	Coverage Δ
...ity/auth/PrincipalAttributeExtractorExtension.java	0.00% <ø> (ø)
...ch/security/auth/PrincipalAttributesExtension.java	0.00% <ø> (ø)

... and 5 files with indirect coverage changes

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