refactor(visual_recognition): v4 changes

BREAKING CHANGE: For `updateClassifier` and `createClassifier`, the parameter `{classname}_positive_examples` is changed to a map called `positive_examples` with classnames as keys.

See the migration guide, UPGRADE-4.0.md, for more information.

Author: dpopp07

UPGRADE-4.0.md

@@ -298,6 +298,28 @@ The following services have been deprecated for an extended period of time and w
 
 
 ### Visual Recognition Compatibility
+#### createClassifier
+- Parameter `{classname}_positive_examples` changed to map `positive_examples`
+
+Instead of passing in multiple parameters like `car_positive_examples` and `boat_positive_examples`, the method now takes a single map with the classnames as the keys:
+```json
+"positive_examples": {
+   "car": <car examples>,
+   "boat": <boat examples>
+}
+```
+
+#### updateClassifier
+- Parameter `{classname}_positive_examples` changed to map `positive_examples`
+
+Instead of passing in multiple parameters like `car_positive_examples` and `boat_positive_examples`, the method now takes a single map with the classnames as the keys:
+```json
+"positive_examples": {
+   "car": <car examples>,
+   "boat": <boat examples>
+}
+```
+
 #### classify
 - Parameter name changed: `image_file` -> `images_file`
 - Parameter `parameters` is no longer supported

test/integration/visual_recognition.custom_classifiers.test.js

@@ -20,7 +20,7 @@ describe.skip('visual_recognition_integration_custom_classifiers @slow', functio
 
   const visual_recognition = new VisualRecognitionV3(
     Object.assign({}, auth.visual_recognition_rc.v3, {
-      version: '2018-03-19',
+      version: '2019-03-27',
     })
   );
 

test/integration/visual_recognition.test.js

@@ -13,7 +13,7 @@ describe('visual_recognition_integration', function() {
 
   const visual_recognition = new VisualRecognitionV3(
     Object.assign({}, auth.visual_recognition_rc.v3, {
-      version: '2018-10-01',
+      version: '2019-03-27',
     })
   );