update voice to match latest changes on the api

Author: germanattanasio

src/main/java/com/ibm/watson/developer_cloud/text_to_speech/v1/model/Voice.java

@@ -25,7 +25,7 @@
 public class Voice {
 
 	/** The Constant ES_ENRIQUE. */
-	public static final Voice ES_ENRIQUE = new Voice("VoiceEsEsEnrique", "male", "es-ES");
+	public static final Voice ES_ENRIQUE = new Voice("es-ES_EnriqueVoice", "male", "es-ES");
 
 	/** The Constant ES_LAURA. */
 	public static final Voice ES_LAURA = new Voice("es-ES_LauraVoice", "female", "es-US");