ssuman-opennms

NMS-13493: Add OpenAPI docs for IpInterfaceRestService

4

### All Contributors * [x] Have you read and followed our [Contribution Guidelines](https://github.com/OpenNMS/opennms/blob/develop/CONTRIBUTING.md)? * [x] Have you [made an issue in the OpenNMS issue tracker](https://issues.opennms.org)?If so, you should: 1. update...