Fix BFD status check and ipv6 PTF intermittent issue.#17819

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

dypet:fix_bfd_status_check_and_ipv6_intermittentdypet/sonic-mgmt:fix_bfd_status_check_and_ipv6_intermittentCopy head branch name to clipboard