CLOUDSTACK-7386: Fixed cleanup issue in test_escalations_volumes.py
CLOUDSTACK-7385: Fixed LB creation issue in test_persistent_networks.py
replace vconfig with ip link
remove trailing comma in options sent to qemu-img
CLOUDSTACK-7398 SecurityGroup Rule related tags cleanup on rule deletion

Signed-off-by: Ilia Shakitko <i.shakitko@tech.leaseweb.com>