Create separate security group method.
Create separate security group method.

We want to make the call method smaller and easier to understand,
and this is a part of a larger refactoring with regards to that.

schubergphilis/vagrant-cloudstack,j00p34/vagrant-cloudstack,bheuvel/vagrant-cloudstack,MissionCriticalCloud/vagrant-cloudstack,bheuvel/vagrant-cloudstack,j00p34/vagrant-cloudstack,nicolasbrechet/vagrant-cloudstack,nicolasbrechet/vagrant-cloudstack,miguelaferreira/vagrant-cloudstack,miguelaferreira/vagrant-cloudstack,schubergphilis/vagrant-cloudstack,MissionCriticalCloud/vagrant-cloudstack