Merge branch '6.0' into master

# Conflicts:
#	Orm/Xtensive.Orm.MySql/Xtensive.Orm.MySql.csproj
#	Orm/Xtensive.Orm.Tests/Issues/IssueGitHub0110_SimpleCommandProcessorOverridesOriginalException.cs
#	Orm/Xtensive.Orm.Tests/Issues/IssueJira0546_IncorrectCachingOfQueries.cs
#	Orm/Xtensive.Orm/Orm/EntitySetBase.cs
#	Orm/Xtensive.Orm/Orm/Internals/EntitySetState.cs
#	Orm/Xtensive.Orm/Orm/Internals/Prefetch/EntitySetTask.cs
#	Orm/Xtensive.Orm/Orm/Internals/Prefetch/Fetcher.cs
#	Orm/Xtensive.Orm/Orm/Internals/Prefetch/PrefetchManager.cs
#	Orm/Xtensive.Orm/Orm/Internals/Prefetch/PrefetchQueryEnumerable.cs
#	Orm/Xtensive.Orm/Orm/Providers/CommandProcessing/BatchingCommandProcessor.cs
#	Orm/Xtensive.Orm/Orm/Providers/CommandProcessing/SimpleCommandProcessor.cs
#	Version.props

Author: alex-kulakov

ChangeLog/6.0.5_Z_Final.txt

@@ -0,0 +1,9 @@
+[main] EntitySet<T>.Prefetch() now re-fetches items in Client profile and in certain transaction isolation levels
+[main] Prefetch extension re-fetches EntitySet<T> items in Client profile and in certain transaction isolation levels
+[main] SessionScope is not derrived from Scope but stand alone class. Functionality remains the same.
+[main] Improved session activation mechanism to work with asynchronous Session opening
+[main] Fixed SimpleCommandProcessor internal command allocation issue which caused 'swollowing' of genuin exception
+[main] Fixed certain cases of incorrect temporary table column structure while using grouping
+[main] Correct command disposal by CommandProcessors
+[mysql] Updated client library package
+[log4net] Updated log4net package

Orm/Xtensive.Orm.Tests/Issues/IssueGitHub0110_SimpleCommandProcessorOverridesOriginalException.cs

@@ -1,4 +1,4 @@
-// Copyright (C) 2021 Xtensive LLC.
+// Copyright (C) 2020-2021 Xtensive LLC.
 // This code is distributed under MIT license terms.
 // See the License.txt file in the project root for more information.
 

Orm/Xtensive.Orm.Tests/Issues/IssueJira0546_IncorrectCachingOfQueries.cs

@@ -1,6 +1,6 @@
-// Copyright (C) 2014-2020 Xtensive LLC.
-// This code is distributed under MIT license terms.
-// See the License.txt file in the project root for more information.
+// Copyright (C) 2014-2021 Xtensive LLC.
+// All rights reserved.
+// For conditions of distribution and use, see license.
 // Created by: Alexey Kulakov
 // Created:    2014.08.08
 
@@ -117,7 +117,7 @@ orderby loc.Id
       return result;
     }
 
-    public IssueJira0546Task (Session session, int startValue)
+    public IssueJira0546Task(Session session, int startValue)
       : base(startValue)
     {
       this.Session = session;
@@ -284,7 +284,7 @@ private void TaskSequencesGenerator(Session session)
       var currentId = 1;
       var iterationsCount = 0;
       while (currentId<80) {
-        var task = new IssueJira0546Task (session, currentId);
+        var task = new IssueJira0546Task(session, currentId);
         var previousId = currentId;
         currentId = task.GetMinimalLocationIdDelayedApi();
         Assert.AreEqual(previousId+1, currentId);
@@ -299,7 +299,7 @@ private void TaskSequencesGenerator(Session session)
       currentId = 1;
       iterationsCount = 0;
       while (currentId < 80) {
-        var task = new IssueJira0546Task (session, currentId);
+        var task = new IssueJira0546Task(session, currentId);
         var previousId = currentId;
         currentId = task.GetMinimalLocationIdFutureApi();
         Assert.AreEqual(previousId + 1, currentId);