Add parsers for the Redfish resources in redfish-map.md

Pure functions for ServiceRoot, ComputerSystem (facts, power state, reset action and ActionInfo), Processors, Memory, Storage/Drives/SimpleStorage, Chassis Thermal and Power as well as ThermalSubsystem/PowerSubsystem/Sensors (with environment_sources to pick whichever exists), Manager, EthernetInterfaces, ManagerNetworkProtocol, accounts, firmware inventory and log services/entries.

tests/parsers/test_service_root.py

@@ -0,0 +1,46 @@
+from napalm_redfish.parsers import parse_service_root
+
+
+def test_service_root(rackmount):
+    root = parse_service_root(rackmount("/redfish/v1/"))
+    assert root["redfish_version"] == "1.15.0"
+    assert root["uuid"] == "92384634-2938-2342-8820-489239905423"
+    assert root["name"] == "Root Service"
+    # Vendor and Product only exist from ServiceRoot 1.5 on, and this mockup has neither.
+    assert root["vendor"] is None
+    assert root["product"] is None
+    assert root["oem_vendors"] == []
+
+
+def test_service_root_links(rackmount):
+    links = parse_service_root(rackmount("/redfish/v1/"))["links"]
+    assert links["Systems"] == "/redfish/v1/Systems"
+    assert links["Chassis"] == "/redfish/v1/Chassis"
+    assert links["Managers"] == "/redfish/v1/Managers"
+    assert links["AccountService"] == "/redfish/v1/AccountService"
+    assert links["UpdateService"] == "/redfish/v1/UpdateService"
+    assert links["SessionService"] == "/redfish/v1/SessionService"
+    # Links.Sessions is where the session login goes.
+    assert links["Sessions"] == "/redfish/v1/SessionService/Sessions"
+    assert "@odata.id" not in links
+
+
+def test_service_root_vendor_and_oem():
+    root = parse_service_root({
+        "RedfishVersion": "1.0.1",
+        "Vendor": "Supermicro",
+        "Product": "X10DRL-i",
+        "Oem": {"Supermicro": {"@odata.type": "#SmcServiceRoot"}},
+        "Systems": {"@odata.id": "/redfish/v1/Systems"},
+    })
+    assert root["vendor"] == "Supermicro"
+    assert root["product"] == "X10DRL-i"
+    assert root["oem_vendors"] == ["Supermicro"]
+    assert root["uuid"] is None
+    assert root["links"] == {"Systems": "/redfish/v1/Systems"}
+
+
+def test_service_root_empty():
+    root = parse_service_root({})
+    assert root["redfish_version"] is None
+    assert root["links"] == {}