CFY-1761 make 'auto' the device name default
CFY-1761 make 'auto' the device name default

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