Update Visual Recognition service

[lpatino10]

This PR updates the Visual Recognition service as of 4/5/18.

[codecov-io]

Codecov Report

Merging #912 into develop will decrease coverage by 27.01%.
The diff coverage is n/a.

@@              Coverage Diff               @@
##             develop     #912       +/-   ##
==============================================
- Coverage      65.84%   38.83%   -27.02%     
+ Complexity      2621     1404     -1217     
==============================================
  Files            551      548        -3     
  Lines          14122    14072       -50     
  Branches         818      818               
==============================================
- Hits            9299     5465     -3834     
- Misses          4409     8290     +3881     
+ Partials         414      317       -97

Impacted Files	Coverage Δ	Complexity Δ
...eloper_cloud/visual_recognition/v3/model/Face.java	25% <ø> (+5%)	1 <0> (ø)	⬇️
...cloud/visual_recognition/v3/model/ClassResult.java	25% <ø> (ø)	1 <0> (ø)	⬇️
...d/visual_recognition/v3/model/ClassifyOptions.java	45.45% <ø> (-9.1%)	10 <0> (ø)
..._cloud/visual_recognition/v3/model/FaceGender.java	33.33% <ø> (ø)	1 <0> (ø)	⬇️
...cloud/visual_recognition/v3/VisualRecognition.java	64.66% <ø> (-10.72%)	12 <0> (-11)
...isual_recognition/v3/model/DetectFacesOptions.java	50% <ø> (-11.12%)	6 <0> (ø)
...per_cloud/visual_recognition/v3/model/FaceAge.java	25% <ø> (ø)	1 <0> (ø)	⬇️
...oud/conversation/v1/model/WorkspaceCollection.java	0% <0%> (-100%)	0% <0%> (-3%)
...oper_cloud/assistant/v1/model/ValueCollection.java	0% <0%> (-100%)	0% <0%> (-3%)
.../developer_cloud/discovery/v1/model/Histogram.java	0% <0%> (-100%)	0% <0%> (-2%)
... and 285 more

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