test: show the highlevel test for lowerranking ones

test: show the highlevel test for lowerranking ones

testsuccess checks the return code, but it does also some autotests
based on the command like grepping for dpkg warnings in a apt-get
install call – but if this finds something it is just showing the grep
command. With this change it will additionally show the first msgtest
which in this case will detail the actual apt-get install call.

Git-Dch: Ignore