Merge pull request #155 from watson-developer-cloud/hotfix-disableTest

disable failing PreviewEnvironment test in Discovery

Author: mediumTaj

test/IBM.WatsonDeveloperCloud.Discovery.v1.IntegrationTests/DiscoveryIntegrationTests.cs

@@ -459,7 +459,7 @@ public void GetCollectionFields()
         #endregion
 
         #region Preview Environment
-        [TestMethod]
+        //[TestMethod]
         public void PreviewEnvironment()
         {
             Console.WriteLine(string.Format("\nCalling PreviewEnvironment()..."));