ospf: T3236: Add XML for new format ospf conf-mode

[sever-sever]

Change Summary

Adding XML for the new OSPF format for future rewriting from Perl to Python.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, renaming)
• Refactoring (no functional changes)
• Migration from an old Vyatta component to vyos-1x, please link to related PR inside obsoleted component
• Other (please describe):

Related Task(s)

T3236

Component(s) name

ospf

How to test

Add a comment in Makefile

# rm -rf $(TMPL_DIR)/protocols/nospf

And in CLI will be new commands

set protocols nospf xxx

Checklist:

• I have read the CONTRIBUTING document
• I have linked this PR to one or more Phabricator Task(s)
• My commit headlines contain a valid Task id
• My change requires a change to the documentation
• I have updated the documentation accordingly