Repair CI build problem

vscode-extensions/vscode-boot-java/scripts/preinstall.sh

@@ -8,9 +8,9 @@ workdir=`pwd`
 npm install ../commons-vscode/commons-vscode-*.tgz
 
 # Use maven to build fat jar of the language server
-#cd ../../headless-services/boot-java-language-server
-#./build.sh
+cd ../../headless-services/boot-java-language-server
+./build.sh
 
 # mkdir -p ${workdir}/jars
-# cp target/*.jar ${workdir}/jars/language-server.jar
+cp target/*.jar ${workdir}/jars/language-server.jar