swagger: add 'required: true' for params in URL (#4097)

* Partial fix for #4010

Swagger validation needs 'required: true' for parameters that are in
the URL path.

Signed-off-by: Steve Traugott <stevegt@t7a.org>

routers/api/v1/org/org.go

@@ -51,6 +51,7 @@ func ListUserOrgs(ctx *context.APIContext) {
 	//   in: path
 	//   description: username of user
 	//   type: string
+	//   required: true
 	// responses:
 	//   "200":
 	//     "$ref": "#/responses/OrganizationList"