tunnel: T2449: bugfix KeyError 'address'
tunnel: T2449: bugfix KeyError 'address'

Commit 9e5c6a935e2f55 ("tunnel: T2449: set accept_ra=2 if ipv6 address autoconf
or dhcpv6 is set") referenced wrong key in dict.
vyos/vyos-1x,vyos/vyos-1x,vyos/vyos-1x,vyos/vyos-1x