[FEATURE] Expand scan command capabilities through the use of different discovery protocols

[davidallendj]

Description of Issue

The motivation of this feature is to allow the magellan tool more flexibility of discovering hardware on a network where doing the standard net scan is not sufficient. For example, it may be possible to enhance the scan command to include a --ssdp flag to perform a scan using SSDP. Each new method only needs to provide enough information to later perform a collect for inventory data afterwards.

Possible Solution

TBD

Other considerations

The purpose of the scan command is to find devices on a network. It does not provide a means for collecting inventory data, but requires sufficient information available to do so. Considering that the collect commands fetches the inventory data using the Redfish API, the scan command currently requires some way of knowing whether the device that's being discovered is a Redfish service to perform a collect efficiently. This may be able to be handled simply by making a HTTP and checking the response status, but this isn't clear at this point.