Issue #2189345 by benjy, sanduhrs, Mile23, joshtaylor, jbekker,...

Issue #2189345 by benjy, sanduhrs, Mile23, joshtaylor, jbekker, David_Rothstein, klausi, sun, zaporylie, pfrenssen, jsacksick, jibran, Mixologic, znerol, Xano, alberto56: run-tests.sh should exit with a failure code if any tests failed