Ensured stability of DB tests.

* Increased connection timeout when deleting or creating DB in DB tests (enables stable parallel execution of all DB tests including the transaction test).
* Let all tests execute in one run again. No more separation of transaction DB test necessary.

Author: ckadluba

Build.ps1

@@ -54,18 +54,7 @@ if ($SkipTests -eq $false) {
 
         echo "build: Testing project in $test"
 
-        & dotnet test -c Release --filter "Category!=Isolated"
-        if($LASTEXITCODE -ne 0) { exit 3 }
-
-        Pop-Location
-    }
-
-    foreach ($test in ls test/*.Tests) {
-        Push-Location $test
-
-        echo "build: Running isolated tests in $test"
-
-        & dotnet test -c Release --filter "Category=Isolated"
+        & dotnet test -c Release
         if($LASTEXITCODE -ne 0) { exit 3 }
 
         Pop-Location

test/Serilog.Sinks.MSSqlServer.Tests/TestUtils/DatabaseFixture.cs

@@ -13,7 +13,7 @@ namespace Serilog.Sinks.MSSqlServer.Tests.TestUtils
     public sealed class DatabaseFixture : IDisposable
     {
 
-        private const string _masterConnectionString = @"Data Source=(localdb)\MSSQLLocalDB;Initial Catalog=Master;Integrated Security=True";
+        private const string _masterConnectionString = @"Data Source=(localdb)\MSSQLLocalDB;Initial Catalog=Master;Integrated Security=True;Connect Timeout=120";
         private const string _createLogEventsDatabase = @"
 EXEC ('CREATE DATABASE [{0}] ON PRIMARY 
 	(NAME = [{0}], 

test/Serilog.Sinks.MSSqlServer.Tests/TestUtils/TestCategory.cs

@@ -5,7 +5,6 @@ public static class TestCategory
         public const string TraitName = "Category";
 
         public const string Integration = nameof(Integration);
-        public const string Isolated = nameof(Isolated);
         public const string Unit = nameof(Unit);
     }
 }

test/Serilog.Sinks.MSSqlServer.Tests/TransactionTests.cs

@@ -6,7 +6,6 @@
 
 namespace Serilog.Sinks.MSSqlServer.Tests
 {
-    [Trait(TestCategory.TraitName, TestCategory.Isolated)]
     public class TransactionTests : DatabaseTestsBase
     {
         public TransactionTests(ITestOutputHelper output) : base(output)