Disable servicebase tests (#27501)

Author: danmoseley

src/System.ServiceProcess.ServiceController/tests/ServiceBaseTests.cs

@@ -14,6 +14,7 @@
 /// </summary>
 namespace System.ServiceProcess.Tests
 {
+    [ActiveIssue("https://github.com/dotnet/corefx/issues/27071")]
     [OuterLoop(/* Modifies machine state */)]
     public class ServiceBaseTests : IDisposable
     {

src/System.ServiceProcess.ServiceController/tests/ServiceControllerTests.cs

@@ -11,6 +11,7 @@
 
 namespace System.ServiceProcess.Tests
 {
+    [ActiveIssue("https://github.com/dotnet/corefx/issues/27071")]
     [OuterLoop(/* Modifies machine state */)]
     public class ServiceControllerTests : IDisposable
     {

src/System.ServiceProcess.ServiceController/tests/System.ServiceProcess.ServiceController.Tests.csproj

@@ -3,6 +3,8 @@
   <Import Project="$([MSBuild]::GetDirectoryNameOfFileAbove($(MSBuildThisFileDirectory), dir.props))\dir.props" />
   <PropertyGroup>
     <ProjectGuid>{F7D9984B-02EB-4573-84EF-00FFFBFB872C}</ProjectGuid>
+      <XunitShowProgress>true</XunitShowProgress>
+      <XunitMaxThreads>1</XunitMaxThreads>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'netcoreapp-Windows_NT-Debug|AnyCPU'" />
   <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'netcoreapp-Windows_NT-Release|AnyCPU'" />