Previously there was no way to specify in which direction security rule
should be applied, only ingress was supported. Also it was impossible
to create IPv6 rules.
This patch added ability to specify direction and ethertype for
Neutron security groups and direction - for AWS security groups
Change-Id: Iba5be7a8a94c34eab3e0e06f95e5358a84a5dd7b
Closes-Bug: #1532317
186612daf7