test: new jenkins script for testing of --leave-stopped option

There is no similar jenkins script that tests similar options now.
So make a new script.
Signed-off-by: Eugene Batalov <eabatalov89@gmail.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

test/jenkins/criu-stop.sh

+# Check --leave-stopped option
+set -e
+source `dirname $0`/criu-lib.sh
+prep
+./test/zdtm.py run -t zdtm/transition/fork --stop --iter 3 || fail