Fixed onSetInput so is always called with new input

[leahmcguire]

Related issues
Metadata for transformers was not being updated when raw feature filter removed features

Describe the proposed solution
Moved onSetInput call into the base (internal) set input call

Describe alternatives you've considered
A clear and concise description of any alternative solutions or features you've considered.

Additional context
Add any other context about the changes here.

[codecov]

Codecov Report

Merging #280 into master will increase coverage by 0.01%.
The diff coverage is 77.77%.

@@            Coverage Diff            @@
##           master    #280      +/-   ##
=========================================
+ Coverage   86.39%   86.4%   +0.01%     
=========================================
  Files         319     319              
  Lines       10450   10453       +3     
  Branches      354     561     +207     
=========================================
+ Hits         9028    9032       +4     
+ Misses       1422    1421       -1

Impacted Files	Coverage Δ
.../op/stages/impl/feature/TextMapNullEstimator.scala	100% <ø> (ø)	⬆️
...la/com/salesforce/op/stages/OpPipelineStages.scala	62.5% <ø> (-1.02%)	⬇️
...sforce/op/stages/impl/feature/Transmogrifier.scala	96.9% <ø> (ø)	⬆️
...rce/op/stages/impl/preparators/SanityChecker.scala	91.59% <0%> (-0.25%)	⬇️
...m/salesforce/op/stages/OpPipelineStageParams.scala	91.66% <100%> (+0.49%)	⬆️
...orce/op/stages/impl/feature/BinaryVectorizer.scala	100% <100%> (ø)	⬆️
...e/op/stages/impl/feature/TextMapLenEstimator.scala	100% <100%> (ø)	⬆️
.../op/features/types/FeatureTypeSparkConverter.scala	99.11% <0%> (+0.88%)	⬆️
.../scala/com/salesforce/op/dsl/RichTextFeature.scala	86.56% <0%> (+1.49%)	⬆️

---

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[codecov]

Codecov Report

Merging #280 into master will decrease coverage by 26.25%.
The diff coverage is 100%.

@@             Coverage Diff             @@
##           master     #280       +/-   ##
===========================================
- Coverage   86.39%   60.14%   -26.26%     
===========================================
  Files         319      319               
  Lines       10440    10692      +252     
  Branches      350      546      +196     
===========================================
- Hits         9020     6431     -2589     
- Misses       1420     4261     +2841

Impacted Files	Coverage Δ
...la/com/salesforce/op/stages/OpPipelineStages.scala	36.98% <ø> (-26.53%)	⬇️
...m/salesforce/op/stages/OpPipelineStageParams.scala	91.66% <100%> (+0.49%)	⬆️
...ages/impl/feature/MultiPickListMapVectorizer.scala	0% <0%> (-100%)	⬇️
...la/com/salesforce/op/aggregators/Geolocation.scala	0% <0%> (-100%)	⬇️
.../salesforce/op/aggregators/FeatureAggregator.scala	0% <0%> (-100%)	⬇️
...lesforce/op/stages/impl/feature/LangDetector.scala	0% <0%> (-100%)	⬇️
...alesforce/op/cli/gen/templates/SimpleProject.scala	0% <0%> (-100%)	⬇️
...sforce/op/stages/base/unary/UnaryTransformer.scala	0% <0%> (-100%)	⬇️
...e/op/stages/impl/feature/TextMapLenEstimator.scala	0% <0%> (-100%)	⬇️
.../op/stages/base/sequence/SequenceTransformer.scala	0% <0%> (-100%)	⬇️
... and 145 more

---

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[tovbinm]

@leahmcguire there are some build failures you might want to look into.

[gerashegalov]

LGTM