build: Fixing build warnings

[memoryz]

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[memoryz]

/azp run

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[memoryz]

/azp run

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[codecov]

Codecov Report

Merging #1080 (e6a26ca) into master (007a884) will increase coverage by 7.63%.
The diff coverage is 86.89%.

❗ Current head e6a26ca differs from pull request most recent head 2dbc4bc. Consider uploading reports for the commit 2dbc4bc to get more accurate results

@@            Coverage Diff             @@
##           master    #1080      +/-   ##
==========================================
+ Coverage   77.26%   84.90%   +7.63%     
==========================================
  Files         230      206      -24     
  Lines        9317     9726     +409     
  Branches      506      552      +46     
==========================================
+ Hits         7199     8258    +1059     
+ Misses       2118     1468     -650     

Impacted Files	Coverage Δ
.../microsoft/ml/spark/automl/HyperparamBuilder.scala	47.61% <0.00%> (ø)
...soft/ml/spark/cognitive/TextAnalyticsSchemas.scala	100.00% <ø> (ø)
...a/com/microsoft/ml/spark/core/utils/RowUtils.scala	0.00% <0.00%> (ø)
...ala/com/microsoft/ml/spark/downloader/Schema.scala	61.53% <0.00%> (ø)
...icrosoft/ml/spark/io/binary/BinaryFileReader.scala	73.91% <ø> (ø)
...a/com/microsoft/ml/spark/io/image/ImageUtils.scala	88.23% <ø> (+15.68%)	⬆️
...ft/ml/spark/lightgbm/booster/LightGBMBooster.scala	87.86% <ø> (ø)
...ft/ml/spark/lightgbm/dataset/LightGBMDataset.scala	83.75% <ø> (ø)
...microsoft/ml/spark/lightgbm/params/FObjParam.scala	100.00% <ø> (ø)
...l/spark/lightgbm/params/LightGBMBoosterParam.scala	100.00% <ø> (ø)
... and 320 more

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[memoryz]

/azp run

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[memoryz]

/azp run

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Azure Pipelines successfully started running 1 pipeline(s).

[memoryz]

/azp run

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Azure Pipelines successfully started running 1 pipeline(s).

[memoryz]

/azp run

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[memoryz]

/azp run

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[mhamilton723]

You are such a legend :)