Restored old /api/messages by default in ASP.NEt

libraries/integration/Microsoft.Bot.Builder.Integration.AspNet.Core/ApplicationBuilderExtensions.cs

@@ -33,7 +33,7 @@ namespace Microsoft.Bot.Builder.Integration.AspNet.Core
 
             var botActivitiesPath = new PathString(options.RouteBaseUrl);
 
-            botActivitiesPath.Add("/activities");
+            botActivitiesPath.Add("/messages");
 
             applicationBuilder.Map(
                 botActivitiesPath, 

libraries/integration/Microsoft.Bot.Builder.Integration.AspNet.Core/BotFrameworkOptions.cs

@@ -15,7 +15,7 @@ namespace Microsoft.Bot.Builder.Integration.AspNet.Core
         {
             _middleware = new List<BotMiddleware.IMiddleware>();
 
-            RouteBaseUrl = "/bot";
+            RouteBaseUrl = "/api";
         }
 
         public PathString RouteBaseUrl { get; set; }