[ANSIENG-3880] | Fix centos7 Tests

[rrbadiani]

Description

Centos 7 has reached EOL and thus our tests which used it are failing. To fix we need to move from mirror.centos.org to vault.centos.org in yum.repos.d files

Fixes # (issue)

Type of change

• [X] 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

How Has This Been Tested?

semaphore

Checklist:

• [ ] Any variable/code changes have been validated to be backwards compatible (doesn't break upgrade)
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] If required, I have ensured the changes can be discovered by cp-ansible discovery codebase
• [ ] My code follows the style guidelines of this project
• [ ] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [ ] My changes generate no new warnings
• [ ] Any dependent changes have been merged and published in downstream modules

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