* Add GetHostInterfaces command to redfish_info
Adding a GetHostInterfaces command to redfish_info in order to report the
following:
- Properties about the HostInterface(s) like Status, InterfaceEnabled, etc
- ManagerEthernetInterface (info on BMC -> host NIC)
- HostEthernetInterfaces (list of NICs for host -> BMC connectivity)
fixes#3692
* add fragment
* fixup for linter
* redfish_utils.py cleanup
- Remove unneeded Properties list from get_nic_inventory()
- Remove bogus key variable from get_hostinterfaces()
- Add additional Properties to collect from HostInterface objects
* fixup for stray deletion
