Enhance northbound interface to get user and roles by id

api/go/gosdn/rbac/role.pb.go

api/go/gosdn/rbac/user.pb.go

api/openapiv2/gosdn_northbound.swagger.json

api/proto/buf.lock

api/proto/gosdn/rbac/role.proto

api/proto/gosdn/rbac/user.proto

cli/cmd/userGet.go

controller/api/role.go

controller/api/role_test.go

controller/api/user.go

controller/api/user_test.go

controller/northbound/server/role.go

controller/northbound/server/role_test.go

controller/northbound/server/user.go

controller/northbound/server/user_test.go