Catalog: Fix inconsistancy of exceptions thrown

Author: alex-kulakov

Orm/Xtensive.Orm/Sql/Model/Catalog.cs

@@ -1,6 +1,6 @@
-// Copyright (C) 2003-2010 Xtensive LLC.
-// All rights reserved.
-// For conditions of distribution and use, see license.
+// Copyright (C) 2009-2022 Xtensive LLC.
+// This code is distributed under MIT license terms.
+// See the License.txt file in the project root for more information.
 
 using System;
 using System.Collections.Generic;
@@ -188,7 +188,7 @@ internal string GetActualDbName(IReadOnlyDictionary<string, string> catalogNameM
       if (!isNamesReadingDenied)
         return DbName;
       if (catalogNameMap==null)
-        throw new InvalidOperationException("Unable to calculate real name for catalog");
+        throw new ArgumentNullException("Unable to calculate real name for catalog");
       var name = GetDbNameInternal();
       string actualName;
       if (catalogNameMap.TryGetValue(name, out actualName))