WIP: Foundational pieces for VRF-aware Monitoring Protocol (VAMP)

[BarbarossaTM]

Signed-off-by: Maximilian Wilhelm max@sdn.clinic

[codecov-commenter]

Codecov Report

Merging #421 (da0600f) into master (c9e7c0f) will decrease coverage by 0.59%.
The diff coverage is 19.60%.

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@@            Coverage Diff             @@
##           master     #421      +/-   ##
==========================================
- Coverage   54.39%   53.81%   -0.59%     
==========================================
  Files         147      150       +3     
  Lines        7899     8028     +129     
==========================================
+ Hits         4297     4320      +23     
- Misses       3397     3502     +105     
- Partials      205      206       +1     

Flag	Coverage Δ
unittests	53.81% <19.60%> (-0.59%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
protocols/vamp/client.go	0.00% <0.00%> (ø)
protocols/vamp/rib_observer.go	0.00% <0.00%> (ø)
protocols/vamp/vrf_tracker.go	90.90% <90.90%> (ø)
protocols/isis/server/lsp.go	0.00% <0.00%> (ø)
protocols/isis/server/neighbor.go	0.00% <0.00%> (ø)
protocols/isis/server/hello_sender.go	0.00% <0.00%> (ø)
protocols/isis/server/net_ifa_manager.go	0.00% <0.00%> (ø)
...rotocols/isis/packet/tlv_ip_interface_addresses.go	66.66% <0.00%> (+4.16%)	⬆️

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