Fix https://issues.apache.org/bugzilla/show_bug.cgi?id=48550
Follow-Up to r1511468:
Fix example servlets to output text as UTF-8. This fixes encoding issues with the "Request Parameters" and "Cookies" servlet examples as otherwise the browser would encode the form data with the document encoding (ISO-8859-1) but Tomcat will interpret it as UTF-8.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1551814 13f79535-47bb-0310-9956-ffa450edef68