Return cluster information regardless of cluster connection failures (#599)

* return cluster information regardless of cluster connection failures

* refactor  code

* format code

Author: khalifan-kfan

app/controllers/clusters.py

@@ -142,6 +142,11 @@ def get(self, cluster_id):
                     cluster=json.loads(validated_cluster_data),
                     resource_count=json.loads(resource_count_json))
             ), 200
+        
+        except client.rest.ApiException as e:
+            error_message = "Could not access cluster or invalid token, please reset your cluster token." \
+            if e.status == 401 or "Unauthorized" in str(e) else str(e)
+            return dict(status='fail', data=dict( cluster=json.loads(validated_cluster_data), resource_count=[]),cluster_error=error_message), 200
 
         except Exception as e:
             return dict(status='fail', message=str(e)), 500