Pass default endpoint URL via config

Author: ginach

Templates/CSharp/Requests/EntityClient.cs.tt

@@ -22,14 +22,14 @@ namespace <#=entityContainer.Namespace.GetNamespaceName()#>
         public <#=clientName#>(
             IAuthenticationProvider authenticationProvider,
             IHttpProvider httpProvider = null)
-            : this("https://graph.microsoft.com/v1.0", authenticationProvider, httpProvider)
+            : this(<#=ConfigurationService.Settings.DefaultBaseEndpointUrl#>, authenticationProvider, httpProvider)
         {
         }
 
         /// <summary>
         /// Instantiates a new <#=clientName#>.
         /// </summary>
-        /// <param name="baseUrl">The base service URL. For example, "https://graph.microsoft.com/v1.0."</param>
+        /// <param name="baseUrl">The base service URL. For example, "<#=ConfigurationService.Settings.DefaultBaseEndpointUrl#>"</param>
         /// <param name="authenticationProvider">The <see cref="IAuthenticationProvider"/> for authenticating request messages.</param>
         /// <param name="httpProvider">The <see cref="IHttpProvider"/> for sending requests.</param>
         public <#=clientName#>(

src/GraphODataTemplateWriter/.config/TemplateWriterSettings.json

@@ -10,6 +10,7 @@
     "TemplatesDirectory": "../../../../Templates",
     "DefaultFileCasing": "UpperCamel",
     "CustomFlags": [ "python2" ],
+    "DefaultBaseEndpointUrl":  "https://graph.microsoft.com/v1.0",
     "LicenseHeader": [
         "Copyright (c) Microsoft Corporation.  All Rights Reserved.  Licensed under the MIT License.  See License in the project root for license information."
     ],

src/GraphODataTemplateWriter/Settings/TemplateWriterSettings.cs

@@ -29,6 +29,7 @@ public TemplateWriterSettings()
             this.TemplatesDirectory = null;
             this.DefaultFileCasing = "UpperCamel";
             this.CustomFlags = new List<string>();
+            this.DefaultBaseEndpointUrl = "https://graph.microsoft.com/v1.0";
         }
 
         public void CopyPropertiesFromMainSettings()
@@ -76,6 +77,8 @@ public Dictionary<string, List<Dictionary<string, string>>> TemplateMapping
         /// </summary>
         public string DefaultFileCasing;
 
+        public string DefaultBaseEndpointUrl { get; set; }
+
         public IList<string> CustomFlags { get; set; }
 
         public IList<string> Plugins { get; set; }