Adding missing examples - server hardware

[madhav-bharadwaj]

Description

Adds examples to following endpoints:
PUT /rest/server-hardware/{id}/mpFirmwareVersion
GET /rest/server-hardware/{id}/physicalServerHardware
PUT /rest/server-hardware/{id}/powerState
PUT /rest/server-hardware/{id}/refreshState

Check List

• New functionality includes testing.
  • All tests pass ($ rake test).
• [] New functionality has been documented in the README if applicable.
  • New functionality has been thoroughly documented in the examples (please include helpful comments).
• New endpoints supported are updated in the endpoints-support.md file.
• [] Changes are documented in the CHANGELOG.

[soodpr]

LGTM 😃

[sijeesh]

LGTM