First step in refactoring as it isn't just message handlers we need to determine the generic types for

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1448332 13f79535-47bb-0310-9956-ffa450edef68
Complete generic type ID refactoring

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1448338 13f79535-47bb-0310-9956-ffa450edef68
Add tests for Encoders

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1448342 13f79535-47bb-0310-9956-ffa450edef68
Remove old comment

git-svn-id: https://svn.apache.org/repos/asf/tomcat/trunk@1448343 13f79535-47bb-0310-9956-ffa450edef68