frr set loopback interface type for default vrf loopback

[arifogel]

No description provided.

[batfish-bot]

This change is 

[dhalperi]

Reviewed 3 of 3 files at r1.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @corinaminer)

[codecov]

Codecov Report

Merging #7039 (3abdbe7) into master (dfd9da7) will decrease coverage by 0.01%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master    #7039      +/-   ##
============================================
- Coverage     71.91%   71.90%   -0.02%     
+ Complexity    37707    37700       -7     
============================================
  Files          3036     3036              
  Lines        154739   154740       +1     
  Branches      18563    18564       +1     
============================================
- Hits         111282   111260      -22     
- Misses        34574    34590      +16     
- Partials       8883     8890       +7     

Impacted Files	Coverage Δ
...tion/cumulus/CumulusConcatenatedConfiguration.java	72.55% <100.00%> (+0.06%)	⬆️
...g/batfish/datamodel/flow/IncomingSessionScope.java	84.61% <0.00%> (-15.39%)	⬇️
...rg/batfish/identifiers/StorageBasedIdResolver.java	85.29% <0.00%> (-5.89%)	⬇️
.../org/batfish/dataplane/rib/RouteAdvertisement.java	83.67% <0.00%> (-4.09%)	⬇️
...col/src/main/java/org/batfish/role/InferRoles.java	91.36% <0.00%> (-1.37%)	⬇️
...src/main/java/org/batfish/coordinator/PoolMgr.java	59.52% <0.00%> (-1.20%)	⬇️
...src/main/java/org/batfish/coordinator/WorkMgr.java	75.57% <0.00%> (-0.55%)	⬇️
...ain/java/org/batfish/storage/FileBasedStorage.java	84.50% <0.00%> (-0.53%)	⬇️
...java/org/batfish/dataplane/ibdp/VirtualRouter.java	90.57% <0.00%> (-0.31%)	⬇️