refactor: updated appsettings.json and deleted MockToolController

Author: KirillBorisovich

HwProj.APIGateway/HwProj.APIGateway.API/Lti/Controllers/MockToolController.cs

@@ -33,7 +33,9 @@
     {
       "id": 1,
       "name": "",
+      "Issuer": "",
       "clientId": "",
+      "JwksEndpoint": "",
       "initiateLoginUri": "",
       "launchUrl": "",
       "deepLinking": ""