[COMMON] Delete data_frame transforms in between tests

Author: estolfo

api-spec-testing/test_file.rb

@@ -126,6 +126,7 @@ def clear_data_xpack(client)
           clear_machine_learning_indices(client)
           create_x_pack_rest_user(client)
           clear_data(client)
+          clear_data_frame_transforms(client)
         end
 
         private
@@ -200,6 +201,12 @@ def clear_snapshots_and_repositories(client)
           end
         end
 
+        def clear_data_frame_transforms(client)
+          client.data_frame.get_data_frame_transform(transform_id: '*')['transforms'].each do |transform|
+            client.data_frame.delete_data_frame_transform(transform_id: transform[:id])
+          end
+        end
+
         def clear_indices(client)
           indices = client.indices.get(index: '_all').keys.reject do |i|
             i.start_with?('.security') || i.start_with?('.watches')