python3-bindings: SubscriptionTest.py increase sleep time
python3-bindings: SubscriptionTest.py increase sleep time

Signed-off-by: Luka Paulic <45fdf0f86bcf8ce66339b9cc27588aaefb1f12d5@gmail.com>

sysrepo/sysrepo,sysrepo/sysrepo,sysrepo/sysrepo