fix: hazelcast service name

[sgomezvillamor]

\W is equivalent to [^a-zA-Z0-9_], which prevents _ to be replaced. However, as reported in PR #386 , _ is not a valid character. Some recent refactors introduced back the issue, so fixing again.

Checklist

• [x] The PR conforms to DataHub's Contributing Guideline (particularly Commit Message Format)
• [ ] Links to related issues (if applicable)
• [ ] Tests for the changes have been added/updated (if applicable)
• [ ] Docs related to the changes have been added/updated (if applicable)

[david-leifker]

Thank you!