This commit removes the default security group rules that are automatically
created when a security group is created. These rules are usually
permissive egress rules which makes it difficult to add more strict egress
security group rules.
this implements two new resource types:
* openstack_networking_secgroup_v2 - create a neutron security group
* openstack_networking_secgroup_rule_v2 - create a newutron security
group rule
Unlike their nova counterparts the neutron security groups allow a user
to specify the target tenant_id allowing a cloud admin to create per
tenant resources.
Joe Topjian