Multiple fixes for policy filters and add support to filter by protocol

[codecov-commenter]

Codecov Report

Merging #413 (3a5ebde) into master (15e330c) will decrease coverage by 0.05%. The diff coverage is 43.47%.

@@            Coverage Diff             @@
##           master     #413      +/-   ##
==========================================
- Coverage   55.31%   55.25%   -0.06%     
==========================================
  Files         146      146              
  Lines        7705     7722      +17     
==========================================
+ Hits         4262     4267       +5     
- Misses       3241     3252      +11     
- Partials      202      203       +1     

Flag	Coverage Δ
unittests	55.25% <43.47%> (-0.06%)	:arrow_down:

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

Impacted Files	Coverage Δ
route/bgp_path.go	48.86% <0.00%> (-0.63%)	:arrow_down:
route/static.go	64.28% <33.33%> (-4.95%)	:arrow_down:
routingtable/filter/term_condition.go	73.07% <44.44%> (-6.47%)	:arrow_down:
routingtable/filter/filter.go	57.89% <80.00%> (+4.95%)	:arrow_up:
routingtable/filter/term.go	66.66% <100.00%> (ø)

:mega: We’re building smart automated test selection to slash your CI/CD build times. Learn more