Issue Summary

When importing CSV/JSON files into JSM Insight and trying to import an object that is referencing a multiple cardinality Object attribute, it does not work. 

In [the documentation|https://support.atlassian.com/jira-service-management-cloud/docs/import-a-csv-file-into-insight/] mentions the following:

To divide multiple values (for the Insight Attributes with multiple cardinalities), you can use "||" (2 pipe characters) within the CSV file."

But it does not work if the attribute references an object even though this is achievable through UI.

Steps to Reproduce

1. Create an object with an attribute that retrieves another object type
2. Change the attribute cardinality to unlimited
3. Try using CSV to set multiple values on the attribute
4. Execute the import

Can use this setting:

sample file content: 

Expected Results

To import multiple object references

Actual Results

It doesn't import the reference attribute (attachment) at all.

Workaround

Currently there is no known workaround for this behaviour.