Firewall config was being inherited by the dpdk service, however
since the firewall service name was the parent (neutron_ovs_agent)
and technically that service was not enabled - the rules were never
applied. This modifies the service name as it is inherited using
map_replace.
Closes-Bug: 1674689
Change-Id: I6676205b8fc1fd578cb2435ad97fe577a9e81d95
Signed-off-by: Tim Rozet <trozet@redhat.com>