CLOUDSTACK-7536 user vm can get a gateway ip when gateway ip is a part of the guest ip range.

Signed-off-by: Jayapal <jayapal@apache.org>
CLOUDSTACK-7728: Fixed adding icmp rules with different types and codes
CLOUDSTACK-7728: Fixed adding iptables rules for egress allow on VR reboot
CLOUDSTACK-7729: listVMSnapshot API not returning parent id in response