flavor and ssh_public_key fields were added to Instance model (nc-178)
copied fields initialization added to Instance model (nc-178)
unittest for Instance model _copy methods (nc-178)
new fields added to instance factory (nc-178)
flavor and ssh_public_key fields marked as required in serializer (nc-178)
tests for instance cascade deletion (nc-178)
instance attributes initialization was removed from view (it is in model now) (nc-178)
flavors with instances can be deleted now - openstack test corrected (nc-178)
Merge branch 'develop' of code.opennodecloud.com:nodeconductor/nodeconductor into feature/nc-178
field uuid added to project groups basic serializer (itacloud-2876)
test for project_groups uuid in customers list (itacloud-2876)
excess blank line removed (itacloud-2876)
Expose uuid in service REST
flavor and public key FK were removed from instance model (nc-178)
references to instance flavor and key were removed from sample data creation command (nc-178)
Merge branch 'feature/itacloud-2876' into 'develop'

Feature/itacloud 2876 (project_group UUID added to GET /api/customers/)
flavor and ssh_public_key were added as explicit fields to serializer(nc-178)
commented methods were removed from instance model (nc-178)
openstack test was deleted, because there are no flavors, connected to instance (nc-178)
isntance_data creation in test modified: Explicit flavor creation was added (nc-178)