refactor: modify if statement for `nsxtedgeNodes`

[burnsjared0415]

Summary

refactored the if statement for nsxtedgeNodes on PowerManagement-ManagementDomain.ps1 to allow for check of overlay network for running Virtual machines

Type

• [ ] Bugfix
• [ ] Enhancement or Feature
• [ ] Code Style or Formatting
• [ ] Documentation
• [x] Refactoring
• [ ] Chore
• [ ] Other Please describe:

Breaking Changes?

• [ ] Yes, there are breaking changes.
• [x] No, there are no breaking changes.

Test and Documentation

• [ ] Tests have been completed.
• [ ] Documentation has been added or updated.

Issue References

Closes #56

Additional Information

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