Rectify test_ipv6_subnet_override option

Related-Bug: PRODX-17659
Change-Id: Icc377c43e19d2b3e31c05213962b76235fae8b46
(cherry picked from commit 664310bf2eb2df47d4c9562030a8a65548b4e4cf)
(cherry picked from commit f93cce7db18e60ec45e64dc8ff8efb97ea62d6d7)
1 file changed