Force kill jobs after integration v2 test finish

Memcached remains stuck with graceful kill, this unblock the script and
the ci lane

Signed-off-by: Mario Fernandez <mariofer@redhat.com>

test/integration-v2.sh

@@ -7,7 +7,7 @@
 set -euo pipefail
 
 result=1
-trap 'kill $(jobs -p); exit $result' EXIT
+trap 'kill -9 $(jobs -p); exit $result' EXIT
 
 (./authorization-server localhost:9101 ./test/tokens.json) &