Add new options to neutron_fwaas.conf for using in Default firewall group
rules. Separate ingress and egress: action, source ipv4, source ipv6,
source port, destination ipv4, destination ipv6, destination port.
Shared options for ingress and egress: protocol, enabled and shared.
New options are used in _create_default_firewall_rules and default
value are same as before this change, ingress (deny all),
egress (allow all).
Change-Id: Ic48872f3b7dfd4a87065799b7d3656de3d06e4c3
Closes-Bug: #1799358
f28c59df2b