Junos: flesh out more tunnel grammar, specifically destination-udp-port

[dhalperi]

Stack:

• Junos: support tagging generated routes #9240
• Junos: slightly more generous BMP station logic #9239
• Junos: flesh out more tunnel grammar, specifically destination-udp-port #9238 ⬅

⚠️ Part of a stack created by spr. Do not merge manually using the UI - doing so may have unexpected results.

[batfish-bot]

This change is 

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.72%. Comparing base (e3a110c) to head (e8574ba).
Report is 54 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #9238      +/-   ##
==========================================
- Coverage   72.73%   72.72%   -0.01%     
==========================================
  Files        3314     3314              
  Lines      170017   170025       +8     
  Branches    20046    20046              
==========================================
- Hits       123658   123655       -3     
- Misses      37197    37207      +10     
- Partials     9162     9163       +1     

Files with missing lines	Coverage Δ
...fish/grammar/flatjuniper/ConfigurationBuilder.java	69.46% <100.00%> (+0.06%)	⬆️

... and 4 files with indirect coverage changes

[SLarkworthy]

Reviewed 5 of 5 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @dhalperi)