Add cluster host to the plugins response (#1219)

Co-authored-by: Kenneth Joss <kenneth@cloudscale.ch>

Author: k-304

plugins/inventory/nb_inventory.py

@@ -550,6 +550,7 @@ def group_extractors(self):
             "cluster": self.extract_cluster,
             "cluster_group": self.extract_cluster_group,
             "cluster_type": self.extract_cluster_type,
+            "cluster_device": self.extract_cluster_device,
             "is_virtual": self.extract_is_virtual,
             "serial": self.extract_serial,
             "asset_tag": self.extract_asset_tag,
@@ -991,6 +992,9 @@ def extract_cluster_type(self, host):
         except Exception:
             return
 
+    def extract_cluster_device(self, host):
+        return host.get("device")
+
     def extract_is_virtual(self, host):
         return host.get("is_virtual")