Back-porting JSR-356
Switch to the AbstractServlet[In|Out]putStream implementations as they have the new Servlet 3.1 methods required that aren't part of the Servlet 3.0 API present in Tomcat 7.
For the same reason, point to the relocated ReadLister, WriterListener, HttpUpgradeHandler and WebConnection interfaces.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1514670 13f79535-47bb-0310-9956-ffa450edef68
Fix unit test failures.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc7.0.x/trunk@1514688 13f79535-47bb-0310-9956-ffa450edef68