Name the node when an inventory component is missing

ConfluentTargetNotFound takes the node as its first argument, and every
other caller passes it. The two inventory plugins constructed it with no
arguments at all, so asking for a component that is not in the inventory
map raised TypeError instead of returning the 404 the path was written to
return.

Both now follow the pattern used a few lines further down for volumes and
name the component that was not found.

confluent_server/confluent/plugins/hardwaremanagement/ipmi.py

@@ -1053,7 +1053,9 @@ class IpmiHandler:
                 await self.make_inventory_map()
                 compname = self.invmap.get(component, None)
                 if compname is None:
-                    await self.output.put(msg.ConfluentTargetNotFound())
+                    await self.output.put(msg.ConfluentTargetNotFound(
+                        self.node,
+                        "No component named '{0}' found".format(component)))
                     return
                 invdata = await self.ipmicmd.get_inventory_of_component(compname)
                 if invdata is None:

confluent_server/confluent/plugins/hardwaremanagement/redfish.py

@@ -975,7 +975,9 @@ class IpmiHandler:
                 await self.make_inventory_map()
                 compname = self.invmap.get(component, None)
                 if compname is None:
-                    await self.output.put(msg.ConfluentTargetNotFound())
+                    await self.output.put(msg.ConfluentTargetNotFound(
+                        self.node,
+                        "No component named '{0}' found".format(component)))
                     return
                 invdata = await self.ipmicmd.get_inventory_of_component(compname)
                 if invdata is None: