build: Add ability to create fat jars

[mhamilton723]

No description provided.

[mhamilton723]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[codecov]

Codecov Report

Merging #702 into master will decrease coverage by 3.99%.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #702    +/-   ##
=======================================
- Coverage   79.89%   75.9%    -4%     
=======================================
  Files         231     231            
  Lines        9119    9119            
  Branches      487     487            
=======================================
- Hits         7286    6922   -364     
- Misses       1833    2197   +364

Impacted Files	Coverage Δ
...microsoft/ml/spark/featurize/text/MultiNGram.scala	17.39% <0%> (-78.27%)	⬇️
...crosoft/ml/spark/featurize/text/PageSplitter.scala	19.51% <0%> (-75.61%)	⬇️
...icrosoft/ml/spark/featurize/CleanMissingData.scala	14.81% <0%> (-74.08%)	⬇️
...cala/org/apache/spark/ml/NamespaceInjections.scala	50% <0%> (-50%)	⬇️
...osoft/ml/spark/featurize/text/TextFeaturizer.scala	28.91% <0%> (-48.2%)	⬇️
...m/microsoft/ml/spark/opencv/ImageTransformer.scala	49.25% <0%> (-47.77%)	⬇️
...cala/org/apache/spark/ml/param/MapArrayParam.scala	5.26% <0%> (-47.37%)	⬇️
...cala/org/apache/spark/ml/param/ArrayMapParam.scala	7.69% <0%> (-46.16%)	⬇️
.../microsoft/ml/spark/featurize/DataConversion.scala	37.28% <0%> (-45.77%)	⬇️
...om/microsoft/ml/spark/featurize/IndexToValue.scala	28.57% <0%> (-28.58%)	⬇️
... and 9 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 035fcd9...aaf15dd. Read the comment docs.