test(assistant-v2): update ITs

Author: kevinkowa

assistant/src/test/java/com/ibm/watson/assistant/v2/AssistantServiceIT.java

@@ -81,7 +81,7 @@ public void testSendMessages() {
         assertNotNull(genericResponses);
         boolean foundTextResponse = false;
         for (RuntimeResponseGeneric generic : genericResponses) {
-          if (generic.responseType().equals("TEXT")) {
+          if (generic.responseType().equals("text")) {
             foundTextResponse = true;
             break;
           }
@@ -139,7 +139,7 @@ public void testSendMessageStateless() {
         assertNotNull(genericResponses);
         boolean foundTextResponse = false;
         for (RuntimeResponseGeneric generic : genericResponses) {
-          if (generic.responseType().equals("TEXT")) {
+          if (generic.responseType().equals("text")) {
             foundTextResponse = true;
             break;
           }