supporting restore from db (#429)

* supporting restore from db

src/Microsoft.SqlTools.ServiceLayer/DisasterRecovery/Contracts/RestoreConfigInfoRequest.cs

@@ -0,0 +1,43 @@
+//
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+//
+
+using System.Collections.Generic;
+using Microsoft.SqlTools.Hosting.Protocol.Contracts;
+
+namespace Microsoft.SqlTools.ServiceLayer.DisasterRecovery.Contracts
+{
+    public class RestoreConfigInfoRequestParams
+    {
+        /// <summary>
+        /// The Uri to find the connection to do the restore operations
+        /// </summary>
+        public string OwnerUri { get; set; }
+    }
+
+    public class RestoreConfigInfoResponse
+    {
+        public RestoreConfigInfoResponse()
+        {
+            ConfigInfo = new Dictionary<string, object>();
+        }
+
+        /// <summary>
+        /// Config Info
+        /// </summary>
+        public Dictionary<string, object> ConfigInfo { get; set; }
+
+        /// <summary>
+        /// Errors occurred while creating the restore config info
+        /// </summary>
+        public string ErrorMessage { get; set; }
+    }
+
+    public class RestoreConfigInfoRequest
+    {
+        public static readonly
+            RequestType<RestoreConfigInfoRequestParams, RestoreConfigInfoResponse> Type =
+                RequestType<RestoreConfigInfoRequestParams, RestoreConfigInfoResponse>.Create("disasterrecovery/restoreconfiginfo");
+    }
+}