ExtendedCommunity: fix case awareness

[dhalperi]

Move lowercase to the top and add a test that failed before.

---

Stack:

• ExtendedCommunity: add support for encapsulation communities #9363
• ExtendedCommunity: fix case awareness #9362 ⬅

⚠️ 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 73.16%. Comparing base (1e04822) to head (aa8465d).
Report is 45 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #9362      +/-   ##
==========================================
- Coverage   73.17%   73.16%   -0.01%     
==========================================
  Files        3321     3321              
  Lines      169222   169222              
  Branches    20118    20118              
==========================================
- Hits       123823   123807      -16     
- Misses      36291    36305      +14     
- Partials     9108     9110       +2     

Files with missing lines	Coverage Δ
...ish/datamodel/bgp/community/ExtendedCommunity.java	83.09% <100.00%> (ø)

... and 7 files with indirect coverage changes

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[dhalperi]

Mention @SirasornT

Reviewable status: 0 of 2 files reviewed, all discussions resolved

[SirasornT]

Reviewed 2 of 2 files at r1.
Reviewable status: all files reviewed (commit messages unreviewed), all discussions resolved (waiting on @dhalperi)

[SirasornT]

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