Write warning to build log about change of generator kind

Author: alex-kulakov

Orm/Xtensive.Orm/Orm/Building/Builders/TypeBuilder.cs

@@ -527,6 +527,10 @@ private KeyInfo BuildKeyInfo(TypeInfo root, HierarchyDef hierarchyDef)
         }
       }
 
+      if (generatorKind != hierarchyDef.KeyGeneratorKind && generatorKind == KeyGeneratorKind.None) {
+        BuildLog.Warning(string.Format(Strings.LogKeyGeneratorKindForHierarchyWithRootXHasChangedToNone, root.Name));
+      }
+
       if (generatorKind == KeyGeneratorKind.None) {
         // No key generator is attached.
         // Each hierarchy has it's own equality identifier.

Orm/Xtensive.Orm/Strings.Designer.cs

@@ -2609,4 +2609,7 @@ Error: {1}</value>
   <data name="ExTranslationOfTimeOnlyToStringWithArbitraryArgumentIsNotSupported" xml:space="preserve">
     <value>Translation of TimeOnly.ToString(string) with arbitrary arguments is not supported. Use TimeOnly.ToString("s").</value>
   </data>
+  <data name="LogKeyGeneratorKindForHierarchyWithRootXHasChangedToNone" xml:space="preserve">
+    <value>Key generator kind for hierarchy with root '{0}' has changed to None. Make sure that all key values are recieved by constructor and passed to one of Entity constructors.</value>
+  </data>
 </root>