Add definitions for a few Junos applications

[ratulm]

Add definitions for junos-{nbds,nbname,tftp}

Add new applications junos-stun-{tcp,udp} and convert junos-stun to an application-set.

Fixes #8003

[batfish-bot]

This change is 

[codecov]

Codecov Report

Merging #8007 (8f60bf9) into master (4c3b57c) will decrease coverage by 0.00%.
The diff coverage is 100.00%.

@@             Coverage Diff              @@
##             master    #8007      +/-   ##
============================================
- Coverage     74.31%   74.30%   -0.01%     
- Complexity    42874    42877       +3     
============================================
  Files          3347     3347              
  Lines        168135   168162      +27     
  Branches      20148    20150       +2     
============================================
+ Hits         124942   124956      +14     
- Misses        33597    33607      +10     
- Partials       9596     9599       +3     

Impacted Files	Coverage Δ
...src/main/java/org/batfish/datamodel/NamedPort.java	100.00% <100.00%> (ø)
...fish/grammar/flatjuniper/ConfigurationBuilder.java	74.36% <100.00%> (+0.02%)	⬆️
...tfish/representation/juniper/JunosApplication.java	99.46% <100.00%> (+0.01%)	⬆️
...sh/representation/juniper/JunosApplicationSet.java	93.22% <100.00%> (+0.23%)	⬆️
...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%)	⬇️
...ain/java/org/batfish/storage/FileBasedStorage.java	85.47% <0.00%> (-0.62%)	⬇️
...tfish/representation/cisco/CiscoConfiguration.java	84.56% <0.00%> (-0.16%)	⬇️
.../org/batfish/dataplane/ibdp/BgpRoutingProcess.java	83.70% <0.00%> (-0.09%)	⬇️

[arifogel]

Reviewed 8 of 8 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @ratulm)