Fix the exit code of the testsuite
Fix the exit code of the testsuite

It should exit with a non-zero status in case of failure. This makes
doing automatic testing much easier.

Change-Id: I025e2dcb9f17628eb9236648ef14a0203c629c16
Reviewed-By: Priya Joshi <3c6cfa6f57440adfc837c4ad04483313acbc2582@morganstanley.com>

quattor/aquilon,quattor/aquilon,stdweird/aquilon,guillaume-philippon/aquilon,stdweird/aquilon,quattor/aquilon,stdweird/aquilon,guillaume-philippon/aquilon,guillaume-philippon/aquilon