Extend IP-in-IP test to check IPv6 in IPv4, IPv4 in IPv6, IPv6 in IP…#682

sihuihan88 merged 2 commits intosonic-net:mastersonic-net/sonic-mgmt:masterfrom

stepanblyschak:ipv6_decap_teststepanblyschak/sonic-mgmt:ipv6_decap_testCopy head branch name to clipboard