PAN BGP: peer addresses, ASN, route reflector parsing and extraction

[dhalperi]

No description provided.

[batfish-bot]

This change is 

[codecov]

Codecov Report

Merging #4880 into master will decrease coverage by <.01%.
The diff coverage is 85.29%.

@@             Coverage Diff              @@
##             master    #4880      +/-   ##
============================================
- Coverage     76.21%    76.2%   -0.01%     
- Complexity    29002    29008       +6     
============================================
  Files          2302     2302              
  Lines        112497   112531      +34     
  Branches      13449    13451       +2     
============================================
+ Hits          85736    85757      +21     
- Misses        20210    20217       +7     
- Partials       6551     6557       +6

Impacted Files	Coverage Δ	Complexity Δ
.../org/batfish/representation/palo_alto/BgpPeer.java	100% <100%> (ø)	13 <8> (+8)	⬆️
...presentation/palo_alto/PaloAltoStructureUsage.java	100% <100%> (ø)	3 <0> (ø)	⬇️
...rammar/palo_alto/PaloAltoConfigurationBuilder.java	82.78% <70.58%> (-0.26%)	267 <4> (+4)
...java/org/batfish/symbolic/state/EdgeStateExpr.java	73.91% <0%> (-4.35%)	10% <0%> (-1%)
...c/main/java/org/batfish/dataplane/rib/RibTree.java	89.58% <0%> (-4.17%)	27% <0%> (-1%)
...src/main/java/org/batfish/coordinator/PoolMgr.java	64.04% <0%> (-1.13%)	15% <0%> (-1%)
...java/org/batfish/dataplane/ibdp/VirtualRouter.java	87.69% <0%> (-0.33%)	255% <0%> (-2%)
...batfish/src/main/java/org/batfish/main/Driver.java	38.3% <0%> (-0.25%)	28% <0%> (ø)

[progwriter]

Reviewed 7 of 7 files at r1.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @sfraint)