Fix for C1CountryIdentifier (COUNTRY_C1) not set in As4PayloadHeader …

[seciq]

… #217

Pull Request Description

Adds getter and setter in the As4PayloadHeader class for c1CountryIdentifier. This is required to fetch the COUNTRY_C1 from the header object for TSR/EUSR statistics reporting.

Type of Pull Request

• New feature/Enhancement - non-breaking change which adds functionality
• Bug fix
• Breaking change (Require Major version change?)

Type of Change

• OpenPeppol AS4 specification
• Oxalis software change or enhancement
• CEF change

Pull Request Checklist:

• My code follows the style guidelines of this project
• I have commented my code, particularly in hard-to-understand areas. But did not added unnecessary annotation/comment say @author name etc
• I have checked my code for variable and method name and corrected grammar/spelling mistakes if any
• I have made corresponding changes to the documentation where needed
• My changes generate no new/additional warnings
• My change is not breaking or creating conflict with associated dependencies
• I have performed a self-review of my own code
• I ran mvn clean install before commit and all tests run successfully
• I conducted basic QA to assure all features are working fine
• My pull request generate no conflicts with master branch
• I requested code review from other team members

[dladlk]

Without overriding getC1CountryIdentifier() with a call to a delegate header, the method always returns null. Looks like an urgent fix.

[aaron-kumar]

Thanks for your contribution @seciq .
This fix will be part of upcoming Oxalis/Oxalis-AS4 release (tentative schedule on 15.10.2023)