hosts/redhat: recognize Korora [GH-2869]
core: remove BasicScope class, not used anymore
core: get rid of more references to scope, old terminology
core: add more tests for MachineReadable UI
core: add tests for MachineReadable and frozen strings
core: if synced folder type is blank, use default
core: merge default synced folders ,don't override [GH-2873]
provisioners/docker: configure auto start properly for new Docker

[GH-2874]