Fix metrics check (#904)

* Replace the hard exception by a warning

The data pipeline is adding itself as a dependency which makes the
script fails.

* Fix check_all_metrics with non-matching dependencies tasks

scripts/check_all_metrics.py

@@ -59,10 +59,10 @@ def get_model_name(queue, task_id: str):
             model_name = route.split(".")[4]  # model_name = "train_component"
             return model_name[6:]
 
-    # Raise an exception if no matching route was found, this can happens when
-    # the current task has a dependency to a non-training task or if the route
+    # Show a warning if no matching route was found, this can happen when the
+    # current task has a dependency to a non-training task or if the route
     # pattern changes.
-    raise Exception(f"No matching route found for task id {task_id}")
+    LOGGER.warning(f"No matching route found for task id {task_id}")
 
 
 def get_model_names(task_id: str) -> List[str]:
@@ -80,8 +80,10 @@ def get_model_names(task_id: str) -> List[str]:
         )
 
         model_name = get_model_name(queue, task_id)
-        LOGGER.info("Adding model %r to download list", model_name)
-        model_names.append(model_name)
+
+        if model_name:
+            LOGGER.info("Adding model %r to download list", model_name)
+            model_names.append(model_name)
 
     return model_names