Added 5 missing rules in rules.xml

Rules are: RSA_KEY_SIZE,  BLOWFISH_KEY_SIZE, UNVALIDATED_REDIRECT, XSS_JSP_PRINT and XSS_SERVLET
As specified at:
https://github.com/porscheinformatik/sonar-find-sec-bugs-plugin/issues/3
https://github.com/porscheinformatik/sonar-find-sec-bugs-plugin/issues/5