fix(tests): use C locale for integration tests

Signed-off-by: Philipp Jungkamp <philipp.jungkamp@rwth-aachen.de>

Author: pjungkamp

tools/integration-tests.sh

@@ -15,7 +15,9 @@ BUILDDIR=${BUILDDIR:-${SRCDIR}/build}
 LOGDIR=${BUILDDIR}/tests/integration
 PATH=${BUILDDIR}/src:${SRCDIR}/tools:${PATH}
 
-export PATH SRCDIR BUILDDIR LOGDIR
+LANG=C
+
+export PATH SRCDIR BUILDDIR LOGDIR LANG
 
 # Default values
 VERBOSE=${VERBOSE:-0}