check_redfish: No network adapter result in "Unable to connect to Host '0.0.0.0', max retries exhausted"

Hi,

found a small bug on a HPE ProLiant RL300 Gen11 (CPU: 1, MEM: 512GB) - BIOS: R11 v1.20 (04/14/2023)

https://github.com/bb-Ricardo/check_redfish/blob/next-release/cr_module/nic.py#L295

On one host “system_response” only contains “Links/EthernetInterfaces/@odata.id” but not “Links/NetworkAdapters/@odata.id”

That results in

ethernet_interfaces_path = /redfish/v1/Systems/1/EthernetInterfaces/
network_adapter_path = None

network_adapter_response now tries to fetch data: https://github.com/bb-Ricardo/check_redfish/blob/next-release/cr_module/nic.py#L303

INFO: Attempt 1 of None?$expand=.
2023-06-01 14:17:17,505 - DEBUG: Starting new HTTPS connection (1): 0.0.0.0none:443
2023-06-01 14:17:17,510 - INFO: Retrying None?$expand=. [HTTPSConnectionPool(host='0.0.0.0none', port=443): Max retries exceeded with url: /?$expand=. (Caused by NewConnectionError('<urllib3.connection.HTTPSConnection object at 0x7fecc10f0f70>: Failed to establish a new connection: [Errno -2] Name or service not known'))]
2023-06-01 14:17:18,512 - DEBUG: HTTP REQUEST (GET) for None?$expand=.:

[CRITICAL]: Unable to connect to Host '0.0.0.0', max retries exhausted.

It added the “None” to the IP which results in the Name or service not known Error.

When I manually set network_adapter_path = f"{redfish_url}/NetworkInterfaces"

then it exits correctly: [UNKNOWN]: Request error: No network adapter or interface data returned for API URL '/redfish/v1/Systems/1//NetworkInterfaces'