FIX: run_once_ip6_renewal
Created by: fpokryvk
FIX '* Force renew IPv6 for "testG"' step:
- captured ipv6 included newline causing problems
- use "ip flush" to remove old address (no need to check that address is deleted afterwards)
Created by: fpokryvk
FIX '* Force renew IPv6 for "testG"' step: