Vscode-Car-Plugin should fail the build if there are errors

[tricktron]

Description:

Make a simple error, e.g. forget the artifact.xml file, then the maven build should fail.

Affected Product Version:
vscode-car-plugin v.5.2.38

OS, DB, other environment details and versions:
Tested on OSX

Steps to reproduce:
Minimal example:
Create a project with the following structure:

src/main
              registry-resources/
              synapse-config/artifact.xml
pom.xml

Run mvn clean package succeeds with error
echo $? # 0

Expected Behaviour
Run mvn clean package should fail the build, due to the missing artifact.xml in registry-resources.
echo $? # 1