fix documentation for language translation

[shikida]

https://github.com/watson-developer-cloud/java-sdk#language-translator says

LanguageTranslator service = new LanguageTranslator();
service.setUsernameAndPassword("<username>", "<password>");

TranslationResult translationResult = service.translate(
  "hello", Language.ENGLISH, Language.SPANISH)
  .execute();

System.out.println(translationResult);

it should say

        LanguageTranslation service = new LanguageTranslation();
        service.setUsernameAndPassword("<username>", "<password>");

        TranslationResult translationResult = service.translate(
          "hello", Language.ENGLISH, Language.SPANISH)
          .execute();

and I think the TOC is wrong too, the link is not working

[germanattanasio]

fixed