test(Speech to Text): Avoid index out of bounds exception in WebSocket test with long files

Author: lpatino10

speech-to-text/src/test/java/com/ibm/watson/developer_cloud/speech_to_text/v1/SpeechToTextIT.java

@@ -305,8 +305,7 @@ public void onError(Exception e) {
 
       @Override
       public void onTranscription(SpeechRecognitionResults speechResults) {
-        Long resultIndex = speechResults.getResultIndex();
-        if (speechResults != null && speechResults.getResults().get(resultIndex.intValue()).isFinalResults()) {
+        if (speechResults != null && speechResults.getResults().get(0).isFinalResults()) {
           asyncResults = speechResults;
         }
       }