Remove Github username from index_name for integration tests

[rohanshah18]

Problem

A couple of integration tests were failing because the index_name included the GitHub username and a UUID, which caused it to exceed the 45-character limit.

Solution

Remove Github username from the index_name

Type of Change

• Bug fix (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 not work as expected)
• This change requires a documentation update
• Infrastructure change (CI configs, etc)
• Non-code change (docs, etc)
• None of the above: (explain here)

Test Plan

Failing integration tests should run successfully now