For refined out sections of an eICR, make sure small empty sections are included in refined output

[robertmitchellv]

Action Requested

During the eICR validation process it was uncovered that all of the sections are required. In practice, we've observed from production eICR messages that there are ways to include empty sections that do not contain data. So when users elects to only include specific sections in a message we need to ensure the sections we're going to refine/remove have minimal empty sections with proper nullFlavor="NI".

AS a $USER, I want to ensure that refined/removed sections contain only what's required SO THAT our message refiner service does not introduce additional errors or warnings to messages

Acceptance Criteria

GIVEN an eICR to be refined
WHEN sections are refined/removed
THEN minimally required tags are retained to pass validation

Testing

Test will need to be added and adjusted for this

Background & Context

This is important because we want to ensure that there are zero additional errors or warnings added when messages pass through the refiner.