correcting tone analyzer test to use tones rather than tone

Author: nfriedly

test/test.tone_analyzer.v3-beta.js

@@ -61,10 +61,10 @@ describe('tone_analyzer.v3', function() {
   });
 
   it('tone API should add optional query parameters', function() {
-      var options = {text: tone_request.text, tone: 'emotion', sentences: true}
+      var options = {text: tone_request.text, tones: 'emotion', sentences: true};
       var req = tone_analyzer.tone(options, noop);
       var body = new Buffer(req.body).toString('ascii');
-      assert.equal(req.uri.href, service.url + tone_path + '?version=2016-02-11&tone=emotion&sentences=true');
+      assert.equal(req.uri.href, service.url + tone_path + '?version=2016-02-11&tones=emotion&sentences=true');
       assert.equal(body, tone_request.text);
       assert.equal(req.method, 'POST');
       assert.equal(req.headers['content-type'], 'text/plain');