[Kyuubi #6760]Passing full username to session

[avishnus]

:mag: Description

Issue References 🔗

This pull request fixes #

Describe Your Solution 🔧

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

Types of changes :bookmark:

• [ ] Bugfix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Test Plan 🧪

Behavior Without This Pull Request :coffin:

Behavior With This Pull Request :tada:

Related Unit Tests

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Checklist 📝

• [ ] This patch was not authored or co-authored using Generative Tooling

Be nice. Be informative.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 10 lines in your changes missing coverage. Please review.

Project coverage is 0.00%. Comparing base (04f4437) to head (d4c4f63).

Files with missing lines	Patch %	Lines
...a/org/apache/kyuubi/service/TFrontendService.scala	0.00%	6 Missing :warning:
...che/kyuubi/server/KyuubiTHttpFrontendService.scala	0.00%	4 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #6767 +/- ## ====================================== Coverage 0.00% 0.00% ====================================== Files 684 684 Lines 42354 42356 +2 Branches 5776 5776 ====================================== - Misses 42354 42356 +2 ```

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