Remind users to sync saved objects in order for training model to show up in Kibana

[ppf2]

We should consider automatically synchronizing Kibana saved objects after using eland_import_hub_model to import a training model to Elasticsearch, or add an output message to the docker run -it --rm --network host elastic/eland eland_import_hub_model script at the end of the process to instruct the user to either call the Kibana API or click on Synchronize saved objects from the ML UI to manually sync the objects in order for the training model to show up.

This will improve the user experience when using the import script.