fix: set default num classes parameter on model

[imatiach-msft]

[imatiach-msft]

/azp run

[azure-pipelines[bot]]

Azure Pipelines successfully started running 1 pipeline(s).

[codecov[bot]]

Codecov Report

Merging #1057 (5c6fa4e) into master (663d965) will decrease coverage by 0.09%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #1057      +/-   ##
==========================================
- Coverage   84.97%   84.88%   -0.10%     
==========================================
  Files         203      203              
  Lines        9689     9690       +1     
  Branches      558      563       +5     
==========================================
- Hits         8233     8225       -8     
- Misses       1456     1465       +9     

Impacted Files	Coverage Δ
...crosoft/ml/spark/lightgbm/LightGBMClassifier.scala	91.11% <100.00%> (+0.09%)	:arrow_up:
...a/com/microsoft/ml/spark/io/http/HTTPClients.scala	73.33% <0.00%> (-13.34%)	:arrow_down:
.../execution/streaming/continuous/HTTPSourceV2.scala	92.08% <0.00%> (-0.72%)	:arrow_down:
...osoft/ml/spark/io/http/PartitionConsolidator.scala	95.74% <0.00%> (+2.12%)	:arrow_up:

---

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 663d965...5c6fa4e. Read the comment docs.