set java home to jdk11

appveyor.yml

@@ -58,7 +58,8 @@ before_build:
     nuget restore -DisableParallelProcessing
     
     if($Env:MAIN_REPO -and ($Env:PLATFORM -eq 'x64'))
-    {        
+    {
+        $env:JAVA_HOME="C:\Program Files\Java\jdk11"
         if ($Env:APPVEYOR_PULL_REQUEST_NUMBER){
             choco install "msbuild-sonarqube-runner" -y
             SonarScanner.MSBuild.exe begin `