CFY-352: Prefix resources - WIP - security groups improvement
CFY-352: Prefix resources - WIP - security groups improvement

GigaSpaces-ProfessionalServices/cloudify-openstack-plugin,geokala/cloudify-openstack-plugin,szpotona/cloudify-openstack-plugin,codilime/cloudify-openstack-plugin,isaac-s/cloudify-openstack-plugin