Add support for Brazilian Portuguese language

[cleydsonjr]

This is just a reference for a PR I'm submitting

[RobWin]

I've added Portuguese (Brazilian). You can select the language as follows:

Swagger2MarkupConfig config = new Swagger2MarkupConfigBuilder()
                .withOutputLanguage(Language.BR)
                .build();
Swagger2MarkupConverter.from(file)
                .withConfig(config)
                .build()
                .toFolder(outputDirectory);

It should be available in version 1.1.1-SNAPSHOT