Merge remote-tracking branch 'origin/v8/dev' into netcore/dev

# Conflicts:
#	src/Umbraco.Core/Services/UserServiceExtensions.cs
#	src/Umbraco.Infrastructure/Examine/ContentValueSetBuilder.cs
#	src/Umbraco.Infrastructure/Runtime/SqlMainDomLock.cs
#	src/Umbraco.Infrastructure/Search/ExamineComposer.cs
#	src/Umbraco.PublishedCache.NuCache/DataSource/DatabaseDataSource.cs
#	src/Umbraco.Tests/UmbracoExamine/IndexInitializer.cs

src/Umbraco.Web/Security/BackOfficeSignInManager.cs

@@ -123,7 +123,9 @@ namespace Umbraco.Web.Security
                     {
                         _logger.WriteCore(TraceEventType.Information, 0,
                             $"Login attempt failed for username {userName} from IP address {_request.RemoteIpAddress}, no content and/or media start nodes could be found for any of the user's groups", null, null);
-                        return SignInStatus.Failure;
+
+                        // We will say its a sucessful login which it is, but they have no node access
+                        return SignInStatus.Success;
                     }
                 }