Delete recaptcha4j.jar

Need to replace recaptcha4j.jar with last version of recaptcha4j (0.0.8)(https://code.google.com/p/recaptcha4j/downloads/list), to solve problem with using old domain and captcha over https error (in present api-secure.recaptcha.net used instead google.com) - http://community.igniterealtime.org/message/238655