Add trailing slash to DataLake endpoints

Author: cormacpayne

src/Authentication.Abstractions/AzureEnvironmentConstants.cs

@@ -130,8 +130,8 @@ public static class AzureEnvironmentConstants
         /// <summary>
         /// The domain name suffix for Azure DataLake services
         /// </summary>
-        public const string AzureDataLakeAnalyticsCatalogAndJobEndpointSuffix = "azuredatalakeanalytics.net";
-        public const string AzureDataLakeStoreFileSystemEndpointSuffix = "azuredatalakestore.net";
+        public const string AzureDataLakeAnalyticsCatalogAndJobEndpointSuffix = "azuredatalakeanalytics.net/";
+        public const string AzureDataLakeStoreFileSystemEndpointSuffix = "azuredatalakestore.net/";
 
         /// <summary>
         /// The token audience for authorizing DataLake requests