fixed the bugs related to relocating db files for restore (#414)

* fixed the bugs related to relocating db files for restore

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

@@ -56,6 +56,32 @@ namespace Microsoft.SqlTools.ServiceLayer.DisasterRecovery.Contracts
         public string ErrorMessage { get; set; }
     }
 
+    /// <summary>
+    /// Database file info
+    /// </summary>
+    public class RestoreDatabaseFileInfo
+    {
+        /// <summary>
+        /// File type (Rows Data, Log ...)
+        /// </summary>
+        public string FileType { get; set; }
+
+        /// <summary>
+        /// Logical Name
+        /// </summary>
+        public string LogicalFileName { get; set; }
+
+        /// <summary>
+        /// Original location of the file to restore to
+        /// </summary>
+        public string OriginalFileName { get; set; }
+
+        /// <summary>
+        /// The file to restore to
+        /// </summary>
+        public string RestoreAsFileName { get; set; }
+    }
+
     /// <summary>
     /// Restore Plan Response
     /// </summary>
@@ -79,7 +105,7 @@ namespace Microsoft.SqlTools.ServiceLayer.DisasterRecovery.Contracts
         /// <summary>
         /// The db files included in the backup file
         /// </summary>
-        public IEnumerable<string> DbFiles { get; set; }
+        public IEnumerable<RestoreDatabaseFileInfo> DbFiles { get; set; }
 
         /// <summary>
         /// Server name