Improve comments & fix typos in role integ test

[manoranjith]

Description

Improve comments and fix typos in the comments. No functional parts of the code were changed.

Category

Improvement

Relevant issue

Testing

Steps to run the tests

No functional parts of the code were changed. So all existing tests should pass.

Checklist

• [x] Name is added to the NOTICE file, if it is not present already.
• [x] Changes are rebased onto the target branch.