Add JITPack java client build

[MrCreosote]

This is smaller than it looks - most of it is just gradle / SDK generated stuff

File list is here: https://jitpack.io/com/github/kbase/catalog/aad1a6d24a/

JITPack UI is here: https://jitpack.io/#kbase/catalog

[MrCreosote]

These deleted files appear to be cruft - they're no longer in the catalog spec AFAICT

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 81.02%. Comparing base (85b5697) to head (aad1a6d).
⚠️ Report is 3 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #178   +/-   ##
========================================
  Coverage    81.02%   81.02%           
========================================
  Files            8        8           
  Lines         2846     2846           
========================================
  Hits          2306     2306           
  Misses         540      540           

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