fix missing header type setting in config decodes script

[adamkorynta]

Problem Description

Fixes #437 .

Solution

Add missing header type and add null checks for unit converter.

how you tested the change

Tested through GUI and unit test.

Where the following done:

• Tests. Check all that apply:
  • Unit tests created or modified that run during ant test.
  • Integration tests created or modified that run during integration testing
    (Formerly called regression tests.)
  • Test procedure descriptions for manual testing
• Was relevant documentation updated?
• Were relevant config element (e.g. XML data) updated as appropriate

[zack-rma]

Changes seem good, but also appear to be causing the POST in some integration tests to fail.

[sonarqubecloud]

Quality Gate passed

Issues
1 New issue
0 Accepted issues

Measures
0 Security Hotspots
89.5% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud