Fix java output

Author: StefanScherer

java/openjdk/ojdkbuild/build.ps1

@@ -1,4 +1,7 @@
 docker build -t openjdk:8-windowsservercore -f windowsservercore/Dockerfile .
 docker build -t openjdk:8-nanoserver -f nanoserver/Dockerfile .
-docker run openjdk:8-windowsservercore java -version 2>&1
-docker run openjdk:8-nanoserver java -version 2>&1
+
+$ErrorActionPreference = 'SilentlyContinue';
+docker run openjdk:8-windowsservercore java -version
+docker run openjdk:8-nanoserver java -version
+$ErrorActionPreference = 'Stop';