Fix missing semicolon in ferm in role::dns::recursor

role::dns::recursor has rules for avoid connection tracking for DNS.
Unfortunately they had a typo, a missing semicolon at the end. Fix that

Change-Id: I651aba5138e715ab5b28c2dae3e167592b50d081
Merge "Fix missing semicolon in ferm in role::dns::recursor" into production