DMED-119 - refactor Uploader class to handle cases where multiple nod…

…es with the same replication source ID are found

schulcloud/h5p/upload.py

@@ -190,7 +190,10 @@ def collection_status(self, collection: Collection, collection_node: Node):
             filename = os.path.basename(child.filepath)
             name = os.path.splitext(filename)[0]
             rep_source_id = create_replicationsourceid(name)
-            node_exists = self.api.find_node_by_replication_source_id(rep_source_id, skip_exception=True)
+            try:
+                node_exists = self.api.find_node_by_replication_source_id(rep_source_id, skip_exception=True)
+            except FoundTooManyException:
+                return "too_many"
             if not node_exists:
                 if uploaded_nodes == 0:
                     return "missing"