With new method _bulk_create in OpenStackSDK, now it is possible to use
it for API methods, which supports creating multiple instances in single
call. Neutron supports couple of resources to be created at once. In
this change we propose to add multiple rules creation for a single
security group.
Change-Id: I5855a6faa706adeaf738a797af0048985bffe65f
9e58f9d77d