Make testng errors visible

[tomg246]

Is your feature request related to a problem? Please describe.
When a TestNG error occurs during initialisation of a build on TAP, there is no error message and the build terminates sucessful without executing any tests

Describe the solution you'd like
testng error message in build log
Optional: build failed

Example for Reproduction
Add private final ResourceBundle b = ResourceBundle.getBundle("bundleDoesNotExist"); as class variable to a testclass and execute via gradle.
This results in a sucessful build where no tests are executed and without a proper error message