Pull Request

Related issue

Addresses #590

Includes csvDelimiter parameter in the addDocuments method
Includes csvDelimiter parameter in the updateDocuments method
Issue #590 has two subtasks as listed below:
[x] Add the new argument to the csv document handler methods
[ ] Add tests
Tests are not included because there are some clarifications that we require to verify if the issue is already partially/completely implemented. After adding the csvDelimiter to each method, we researched adding a custom csv delimiter in Java and found no built-in support. Would this be best completed by utilizing an external library like OpenCSV?
This PR addresses the function parameter additions to support a custom csvDelimiter if necessary but does not adequately test the functionality of these additions.
It is unclear from the issue if this is already implemented, this would address the first subtask for #590 if the issue has not been implemented yet.

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[x] Does this PR fix an existing issue, or have you listed the changes applied in the PR description (and why they are needed)?
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