Refactoring set-vlan-vid_spec.rb (refs #236)
Refactoring set-vlan-priority_spec.rb (refs #236)
Refactoring set-vlan-header_spec.rb (refs #236)
Refactoring vendor-action_spec.rb (refs #236)
Refactoring send-out-port_spec.rb (refs #236)
English correction, thanks Nick-san (refs #236)
Merge branch 'develop' into topo-trema-C
Merge branch 'develop' into topo-trema-C