Add docker format to create image on glance v2
Add docker format to create image on glance v2

Change-Id: If9353b20bb145f3df4c30bcbbeea173e7604cea6
Closes-Bug: #1522263

dreamhost/api-site,Tesora/tesora-api-site,Tesora/tesora-api-site,Tesora/tesora-api-site,Tesora/tesora-api-site,openstack/api-site,dreamhost/api-site,openstack/api-site,dreamhost/api-site,dreamhost/api-site,Tesora/tesora-api-site,dreamhost/api-site,Tesora/tesora-api-site,dreamhost/api-site,openstack/api-site,openstack/api-site,dreamhost/api-site,Tesora/tesora-api-site