T5889: Fix migration scripts nat 5-to-6
The current migration drop interface name for NAT where not should
nat { source { rule 100 { outbound-interface { name "eth0" ... } } }
After migration we lost interface:
/home/vyos# /opt/vyatta/etc/config-migrate/migrate/nat/5-to-6 tmp.conf
/home/vyos#
/home/vyos# cat tmp.conf | grep "nat {" -A 10
nat {
source { rule 100 { outbound-interface { interface-name "" ... } }
}
This commit fixes it. (cherry picked from commit 813237d9766f636394b9ab385bb825fbf83202b3)